271 results on '"Péter Sótonyi"'
Search Results
2. Quantitative Comparison of Color-Coded Parametric Imaging Technologies Based on Digital Subtraction and Digital Variance Angiography: A Retrospective Observational Study
- Author
-
István Góg, Péter Sótonyi, Balázs Nemes, János P. Kiss, Krisztián Szigeti, Szabolcs Osváth, and Marcell Gyánó
- Subjects
color-coded parametric imaging ,digital subtraction angiography ,digital variance angiography ,time–density curve ,peripheral artery disease ,critical limb ischemia ,Photography ,TR1-1050 ,Computer applications to medicine. Medical informatics ,R858-859.7 ,Electronic computers. Computer science ,QA75.5-76.95 - Abstract
The evaluation of hemodynamic conditions in critical limb-threatening ischemia (CLTI) patients is inevitable in endovascular interventions. In this study, the performance of color-coded digital subtraction angiography (ccDSA) and the recently developed color-coded digital variance angiography (ccDVA) was compared in the assessment of key time parameters in lower extremity interventions. The observational study included 19 CLTI patients who underwent peripheral vascular intervention at our institution in 2020. Pre- and post-dilatational images were retrospectively processed and analyzed by a commercially available ccDSA software (Kinepict Medical Imaging Tool 6.0.3; Kinepict Health Ltd., Budapest, Hungary) and by the recently developed ccDVA technology. Two protocols were applied using both a 4 and 7.5 frames per second acquisition rate. Time-to-peak (TTP) parameters were determined in four pre- and poststenotic regions of interest (ROI), and ccDVA values were compared to ccDSA read-outs. The ccDVA technology provided practically the same TTP values as ccDSA (r = 0.99, R2 = 0.98, p < 0.0001). The correlation was extremely high independently of the applied protocol or the position of ROI; the r value was 0.99 (R2 = 0.98, p < 0.0001) in all groups. A similar correlation was observed in the change in passage time (r = 0.98, R2 = 0.96, p < 0.0001). The color-coded DVA technology can reproduce the same hemodynamic data as a commercially available DSA-based software; therefore, it has the potential to be an alternative decision-supporting tool in catheter labs.
- Published
- 2024
- Full Text
- View/download PDF
3. Comparison of the Snare Loop Technique and the Hungaroring Reinforcement for Physician-Modified Endograft Fenestrations—An In Vitro Study
- Author
-
Artúr Hüttl, Tin Dat Nguyen, Sarolta Borzsák, András Süvegh, András Szentiványi, István Szilvácsku, Dóra Kovács, János Dobránszky, Péter Sótonyi, and Csaba Csobay-Novák
- Subjects
endovascular aortic repair ,physician-modified endograft ,fenestration ,reinforcement ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Background: We conducted an in vitro comparison of the snare loop reinforcement against a closed-loop reinforcement (Hungaroring) for physician-modified endograft (PMEG) fenestrations regarding preparation time and stability during flaring balloon dilatation. Materials and methods: The time to complete a PMEG fenestration with reinforcement was measured and compared between the Hungaroring and snare loop groups. The number of stitches was counted. Each fenestration was dilated using a 10 mm high-pressure, non-compliant balloon up to 21 atm in pressure, and fluoroscopic images were taken. The presence of indentation on the oversized balloon at the level of the reinforcement was evaluated at each fenestration. Results: Five fenestrations were created in each group (n = 5) for a total of ten pieces. The completion time in the snare loop group was 1070 s (IQR:1010–1090) compared to 760 s (IQR:685–784) in the Hungaroring group (p = 0.008). Faster completion time was achieved by faster stitching (23.2 s/stitch (IQR 22.8–27.3) for the snare loop group and 17.3 s/stitch (IQR 17.3–20.1) for the Hungaroring group (p = 0.016). None of the fluoroscopic images of the snare loop reinforcement showed an indentation on the balloon during the overexpansion; on the contrary, the Hungaroring showed indentation in every case, even at 21 atm. Conclusion: Fenestrations reinforced with Hungaroring can be completed significantly faster. Furthermore, the Hungaroring resists over-dilation even at high pressures, while snare loop reinforcements dilate at nominal pressure.
- Published
- 2024
- Full Text
- View/download PDF
4. Impaired cerebrovascular reactivity correlates with reduced retinal vessel density in patients with carotid artery stenosis: Cross-sectional, single center study.
- Author
-
Rita Magyar-Stang, Lilla István, Hanga Pál, Borbála Csányi, Anna Gaál, Zsuzsanna Mihály, Zsófia Czinege, Péter Sótonyi, Horváth Tamás, Akos Koller, Dániel Bereczki, Illés Kovács, and Róbert Debreczeni
- Subjects
Medicine ,Science - Abstract
BackgroundThe cerebral and retinal circulation systems are developmentally, anatomically, and physiologically interconnected. Thus, we hypothesized that hypoperfusion due to atherosclerotic stenosis of the internal carotid artery (ICA) can result in disturbances of both cerebral and retinal microcirculations. We aimed to characterize parameters indicating cerebrovascular reactivity (CVR) and retinal microvascular density in patients with ICA stenosis, and assess if there is correlation between them.MethodsIn this cross-sectional study the middle cerebral artery (MCA) blood flow velocity was measured by transcranial Doppler (TCD) and, simultaneously, continuous non-invasive arterial blood pressure measurement was performed on the radial artery by applanation tonometry. CVR was assessed based on the response to the common carotid artery compression (CCC) test. The transient hyperemic response ratio (THRR) and cerebral arterial resistance transient hyperemic response ratio (CAR-THRR) were calculated. Optical coherence tomography angiography (OCTA) was used to determine vessel density (VD) on the papilla whole image for all (VDP-WIall) and for small vessels (VDP-WIsmall). The same was done in the peripapillary region: all (VDPPall), and small (VDPPsmall) vessels. The VD of superficial (VDMspf) and deep (VDMdeep) macula was also determined. Significance was accepted when pResultsTwenty-four ICA stenotic patients were evaluated. Both CVR and retinal VD were characterized. There was a significant, negative correlation between CAR-THRR (median = -0.40) and VDPPsmall vessels (median = 52%), as well as between VDPPall vessels (median = 58%), and similar correlation between CAR-THRR and VDP-WIsmall (median = 49.5%) and between VDP-WIall (median = 55%).ConclusionThe significant correlation between impaired cerebrovascular reactivity and retinal vessel density in patients with ICA stenosis suggests a common mechanism of action. We propose that the combined use of these diagnostic tools (TCD and OCTA) helps to better identify patients with increased ischemic or other cerebrovascular risks.
- Published
- 2023
- Full Text
- View/download PDF
5. Digital variance angiography allows about 70% decrease of DSA-related radiation exposure in lower limb X-ray angiography
- Author
-
Marcell Gyánó, Márton Berczeli, Csaba Csobay-Novák, Dávid Szöllősi, Viktor I. Óriás, István Góg, János P. Kiss, Dániel S. Veres, Krisztián Szigeti, Szabolcs Osváth, Ákos Pataki, Viktória Juhász, Zoltán Oláh, Péter Sótonyi, and Balázs Nemes
- Subjects
Medicine ,Science - Abstract
Abstract Our aim was to investigate whether the previously observed higher contrast-to-noise ratio (CNR) and better image quality of Digital Variance Angiography (DVA) - compared to Digital Subtraction Angiography (DSA) - can be used to reduce radiation exposure in lower limb X-ray angiography. This prospective study enrolled 30 peripheral artery disease patients (mean ± SD age 70 ± 8 years) undergoing diagnostic angiography. In all patients, both normal (1.2 µGy/frame; 100%) and low-dose (0.36 µGy/frame; 30%) protocols were used for the acquisition of images in three anatomical regions (abdominal, femoral, crural). The CNR of DSA and DVA images were calculated, and the visual quality was evaluated by seven specialists using a 5-grade Likert scale. For investigating non-inferiority, the difference of low-dose DVA and normal dose DSA scores (DVA30-DSA100) was analyzed. DVA produced two- to three-fold CNR and significantly higher visual score than DSA. DVA30 proved to be superior to DSA100 in the crural region (difference 0.25 ± 0.07, p
- Published
- 2021
- Full Text
- View/download PDF
6. Human blood vessel microbiota in healthy adults based on common femoral arteries of brain-dead multi-organ donors
- Author
-
László Hidi, Gergely Imre Kovács, Dóra Szabó, Nóra Makra, Kinga Pénzes, János Juhász, Péter Sótonyi, and Eszter Ostorházi
- Subjects
vascular ,blood vessel ,microbiota ,allograft ,16S rRNA ,Microbiology ,QR1-502 - Abstract
Discovery of human microbiota is fundamentally changing our perceptions of certain diseases and their treatments. However little is known about the human blood vessel microbiota, it may have important effects on vascular pathological lesions and vascular homograft failure. In our prospective survey study fourteen femoral arteries, harvested from donors in multi-organ donations, were examined using the V3-V4 region 16S rRNA sequencing method. The most abundant phyla in the human vascular microbiota were Proteobacteria, Firmicutes and Actinobacteria. At the genus level, the most abundant taxa were Staphylococcus, Corynebacterium, Pseudomonas, Bacillus, Acinetobacter and Propionibacterium. Of the bacterial taxa that have an indirect effect on the development of atherosclerosis, we found Porphyromonas gingivalis, Prevotella nigrescens and Enterobacteriaceae spp. with different abundances in our samples. Of the bacteria that are more common in the intestinal flora of healthy than of atherosclerosis patients, Roseburia and Ruminococcus occurred in the majority of samples. The human arterial wall has a unique microbiota that is significantly different in composition from that of other areas of the body. Our present study provides a basis for ensuing research that investigates the direct role of the microbiota in vascular wall abnormalities and the success of vascular allograft transplantations.
- Published
- 2022
- Full Text
- View/download PDF
7. A Propensity-Matched Comparison of Ischemic Brain Lesions on Postprocedural MRI in Endovascular versus Open Carotid Artery Reconstruction
- Author
-
Zsuzsanna Mihály, Samuel Booth, Dat Tin Nguyen, Milán Vecsey-Nagy, Miklós Vértes, Zsófia Czinege, Csongor Péter, Péter Sótonyi, and Andrea Varga
- Subjects
carotid artery stenosis ,carotid artery stenting ,carotid artery endarterectomy ,ischemic brain lesions ,carotid plaque features ,ct angiography ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
(1) Study purpose: The aim of our prospective single-center, matched case–control study was to compare the number and volume of acute ischemic brain lesions following carotid endarterectomy (CEA) versus carotid artery stenting (CAS) using a propensity-matched design. (2) Methods: Carotid bifurcation plaques were analyzed by using VascuCAP software on CT angiography (CTA) images. The number and volume of acute and chronic ischemic brain lesions were assessed on MRI scans taken 12–48 h after the procedures. Propensity score-based matching was performed at a 1:1 ratio to compare the ischemic lesions on postinterventional MR. (3) Results: A total of 107 patients (CAS, N = 33; CEA, N = 74) were included in the study. There were significant differences in smoking (p = 0.003), total calcification plaque volume (p = 0.004), and lengths of the lesion (p = 0.045) between the CAS and CEA groups. Propensity score matching resulted in 21 matched pairs of patients. Acute ischemic brain lesions were detected in ten patients (47.6%) of the matched CAS group and in three patients (14.2%) in the matched CEA group (p = 0.02). The volume of acute ischemic brain lesions was significantly larger (p = 0.04) in the CAS group than in the CEA group. New ischemic brain lesions were not associated with neurological symptoms in either group. (4) Conclusions: Procedure-related new acute ischemic brain lesions occurred significantly more frequently in the propensity-matched CAS group.
- Published
- 2023
- Full Text
- View/download PDF
8. Radiation Exposure Reduction by Digital Variance Angiography in Lower Limb Angiography: A Randomized Controlled Trial
- Author
-
Péter Sótonyi, Márton Berczeli, Marcell Gyánó, Péter Legeza, Zsuzsanna Mihály, Csaba Csobay-Novák, Ákos Pataki, Viktória Juhász, István Góg, Krisztián Szigeti, Szabolcs Osváth, János P. Kiss, and Balázs Nemes
- Subjects
digital variance angiography ,digital subtraction angiography ,radiation reduction ,radiation protection ,peripheral artery disease ,lower limb angiography ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Background: digital variance angiography (DVA) provides higher image quality than digital subtraction angiography (DSA). This study investigates whether the quality reserve of DVA allows for radiation dose reduction during lower limb angiography (LLA), and compares the performance of two DVA algorithms. Methods: this prospective block-randomized controlled study enrolled 114 peripheral arterial disease patients undergoing LLA into normal dose (ND, 1.2 µGy/frame, n = 57) or low-dose (LD, 0.36 µGy/frame, n = 57) groups. DSA images were generated in both groups, DVA1 and DVA2 images were generated in the LD group. Total and DSA-related radiation dose area product (DAP) were analyzed. Image quality was assessed on a 5-grade Likert scale by six readers. Results: the total and DSA-related DAP were reduced by 38% and 61% in the LD group. The overall visual evaluation scores (median (IQR)) of LD-DSA (3.50 (1.17)) were significantly lower than the ND-DSA scores (3.83 (1.00), p < 0.001). There was no difference between ND-DSA and LD-DVA1 (3.83 (1.17)), but the LD-DVA2 scores were significantly higher (4.00 (0.83), p < 0.01). The difference between LD-DVA2 and LD-DVA1 was also significant (p < 0.001). Conclusions: DVA significantly reduced the total and DSA-related radiation dose in LLA, without affecting the image quality. LD-DVA2 images outperformed LD-DVA1, therefore DVA2 might be especially beneficial in lower limb interventions.
- Published
- 2023
- Full Text
- View/download PDF
9. Distribution of cortactin in cerebellar Purkinje cell spines
- Author
-
Lilla E. Szabó, G. Mark Marcello, Miklós Süth, Péter Sótonyi, and Bence Rácz
- Subjects
Medicine ,Science - Abstract
Abstract Dendritic spines are the primary sites of excitatory transmission in the mammalian brain. Spines of cerebellar Purkinje Cells (PCs) are plastic, but they differ from forebrain spines in a number of important respects, and the mechanisms of spine plasticity differ between forebrain and cerebellum. Our previous studies indicate that in hippocampal spines cortactin—a protein that stabilizes actin branch points—resides in the spine core, avoiding the spine shell. To see whether the distribution of cortactin differs in PC spines, we examined its subcellular organization using quantitative preembedding immunoelectron microscopy. We found that cortactin was enriched in the spine shell, associated with the non-synaptic membrane, and was also situated within the postsynaptic density (PSD). This previously unrecognized distribution of cortactin within PC spines may underlie structural and functional differences in excitatory spine synapses between forebrain, and cerebellum.
- Published
- 2021
- Full Text
- View/download PDF
10. The effects of changing meteorological parameters on fatal aortic catastrophes
- Author
-
Brigitta Szilágyi, Márton Berczeli, Attila Lovas, Zoltán Oláh, Klára Törő, and Péter Sótonyi
- Subjects
Acute aortic dissection ,Ruptured aortic aneurysm ,Cox process model ,Non-parametric approach ,Statistical learning ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Abstract Background Over the span of the last decade, medical research has been increasingly putting greater emphasis on the study of meteorological parameters due to their connection to cardiovascular diseases. The main goal of this study was to explore the relationship between fatal aortic catastrophes and changes in atmospheric pressure and temperature. Methods We used a Cox process model to quantify the effects of environmental factors on sudden deaths resulting from aortic catastrophes. We used transfer entropy to draw conclusion about the causal connection between mortality and meteorological parameters. Our main tool was a computer program which we developed earlier in order to evaluate the relationship between pulmonary embolism mortality and weather on data sets comprised of aortic aneurysm (AA) and acute aortic dissection (AAD) cases, where one of these two medical conditions had led to fatal rupture of the aorta. Our source for these cases were the autopsy databases of Semmelweis University, from the time period of 1994 to 2014. We have examined 160 aneurysm and 130 dissection cases in relation to changes in meteorological parameters. The algorythm implemented in our program is based on a non-parametric a Cox process model. It is capable of splitting slowly varying unknown global trends from fluctuations potentially caused by weather. Furthermore, it allows us to explore complex non-linear interactions between meteorological parameters and mortality. Results Model measures the relative growth of the expected number of events on the nth day caused by the deviation of environmental parameters from its mean value. The connection between ruptured aortic aneurysms (rAA) and changes in atmospheric pressure is more significant than their connection with mean daily temperatures. With an increase in atmospheric pressure, the rate of rAA mortality also increased. The effects of meteorological parameters were weaker for deaths resulting from acute aortic dissections (AAD), although low mean daily temperatures increased the intensity of occurrence for AAD-related deaths. Conclusion The occurrence rate of fatal aortic catastrophes showed a slight dependence on the two examined parameters within our groups.
- Published
- 2020
- Full Text
- View/download PDF
11. Impact of Diabetes Mellitus on Early Clinical Outcome and Stent Restenosis after Carotid Artery Stenting
- Author
-
Alexandru Achim, Dávid Lackó, Artúr Hüttl, Csaba Csobay-Novák, Ádám Csavajda, Péter Sótonyi, Béla Merkely, Balázs Nemes, and Zoltán Ruzsa
- Subjects
Diseases of the endocrine glands. Clinical endocrinology ,RC648-665 - Abstract
Background. Diabetes mellitus is closely related to both the severity of carotid disease and its outcome after revascularization. Carotid artery stenting (CAS) has emerged as a viable alternative to surgical endarterectomy but little is known about the impact of diabetes after CAS. Methods. A consecutive cohort of 1940 patients undergoing CAS in two institutions was divided into two groups, diabetics and nondiabetics, and major cerebrovascular events (MACCEs) were analyzed at 30 days post-CAS and at 1 year follow-up. Results. There were 730 patients with diabetes, with significantly higher BMI, hypertension, chronic dialysis, and dyslipidemia frequency (p
- Published
- 2022
- Full Text
- View/download PDF
12. Comparison of arterial and venous allograft bypass in chronic limb-threatening ischemia.
- Author
-
Dávid Garbaisz, Péter Osztrogonácz, András Mihály Boros, László Hidi, Péter Sótonyi, and Zoltán Szeberin
- Subjects
Medicine ,Science - Abstract
IntroductionFemoro-popliteal bypass with autologous vascular graft is a key revascularization method in chronic limb-threatening ischemia (CLTI). However, the lack of suitable autologous conduit may occur in 15-45% of the patients, necessitating the implantation of prosthetic or allogen grafts. Only little data is available on the outcome of allograft use in CLTI.AimsOur objective were to evaluate the long term results of infrainguinal allograft bypass surgery in patients with chronic limb-threatening ischemia (CLTI) and compare the results of arterial and venous allografts.MethodsSingle center, retrospective study analysing the outcomes of infrainguinal allograft bypass surgery in patients with CLTI between January 2007 and December 2017.ResultsDuring a 11-year period, 134 infrainguinal allograft bypasses were performed for CLTI [91 males (67.9%)]. Great saphenous vein (GSV) was implanted in 100 cases, superficial femoral artery (SFA) was implanted in 34 cases. Early postoperative complications appeared in 16.4% of cases and perioperative mortality (ConclusionAllograft implantation is a suitable method for limb salvage in CLTI. The patency of arterial allograft is better than venous allograft patency, especially in below-knee position during infrainguinal allograft bypass surgery.
- Published
- 2022
- Full Text
- View/download PDF
13. Estimation of Cerebrovascular Reactivity in Patients with Significant Carotid Stenosis by Transcranial Doppler During Valsalva Manoeuvre
- Author
-
Stang Rita, Borbála Csányi, Hanga Pál, Zsuzsanna Mihály, Péter Osztrogonácz, Zsófia Czinege, Tamás Horváth, Péter Sótonyi, Dániel Bereczki, and Róbert Debreczeni
- Subjects
Diseases of the circulatory (Cardiovascular) system ,RC666-701 ,Surgery ,RD1-811 - Published
- 2022
- Full Text
- View/download PDF
14. The Effect of Circle of Willis (CoW) Morphology and Carotid Endarterectomy (CEA) on Retinal Blood Flow in Patients with Carotid Stenosis Measured by Optical Coherence Tomography Angiography (OCTA)
- Author
-
Mihály Zsuzsanna, Lilla István, Fruzsina Benyó, Cecília Czakó, Illés Kovács, Andrea Varga, Péter Banga, and Péter Sótonyi
- Subjects
Diseases of the circulatory (Cardiovascular) system ,RC666-701 ,Surgery ,RD1-811 - Published
- 2022
- Full Text
- View/download PDF
15. Comparison of Police Data on Animal Cruelty and the Perception of Animal Welfare NGOs in Hungary
- Author
-
Gábor Lorászkó, Szilvia Vetter, Bence Rácz, Péter Sótonyi, and László Ózsvári
- Subjects
animal welfare ,animal protection ,animal cruelty ,police ,NGOs ,survey ,Veterinary medicine ,SF600-1100 ,Zoology ,QL1-991 - Abstract
Animal cruelty has been a criminal offence in Hungary since 2004 and the legislator has tightened and differentiated the regulations in several waves since then. However, it is not an exaggeration to say that the public is often impatient and dissatisfied with the actions of the authorities in relation to animal cruelty. In our research, based on the data of the Criminal Investigation Department of the National Police Headquarters, we examined the opinions of 99 out of a total of 155 police stations in Hungary whose staff currently working there had experience in dealing with animal cruelty. The investigators gave their opinion on a total of 1169 cases in which some kind of police action was taken, either following a report to the police or as a result of their own investigative actions. In another survey, we questioned those members of society who are most committed to animal protection using a self-completion questionnaire. The questionnaire sent to the 116 Hungarian animal welfare non-governmental organisations (NGOs) on the publicly available lists was also posted for a short period on the social networking site of NGO activists. Among those who responded, a total of 150 identified as active participants in the animal protection work of these NGOs. The picture of the police treatment of animal cruelty, as perceived by NGOs working in the field of animal protection, is significantly less favourable than suggested by the police data. According to the official data, 77.7% of reports initiated an investigation, while the vast majority of animal welfare activists (81.3%) suspects that only 25% of the reports result in action by the prosecuting authority.
- Published
- 2023
- Full Text
- View/download PDF
16. Midterm Results of Iliac Branch Devices in a Newly Established Aortic Center
- Author
-
Sarolta Borzsák, András Süvegh, András Szentiványi, Daniele Mariastefano Fontanini, Milán Vecsey-Nagy, Péter Banga, Péter Sótonyi, Zoltán Szeberin, and Csaba Csobay-Novák
- Subjects
iliac aneurysm ,endovascular procedures ,iliac branch device ,Science - Abstract
The first-line treatment of common iliac artery aneurysms is endovascular repair. International guidelines recommend the preservation of the internal iliac artery, which is best achieved by the implantation of an iliac bifurcation device (IBD). Our aim was to evaluate the initial midterm results of IBDs in the leading vascular center of Hungary. In this single-center retrospective study, relevant clinical data and the results of the imaging examinations were collected and analyzed in all patients who underwent IBD implantation between December 2010 and July 2021. Thirty-five patients (31 males, mean age: 67.9 ± 8.5 years) underwent endovascular treatment with 37 IBD implantations. Technical success was achieved in 88.2% of the patients, with no perioperative mortality or open surgical conversion. One patient was lost during follow-up. Internal iliac artery occlusion was detected in three (8.8%) patients, and reintervention was performed in five (14.7%) patients. Primary patency of the internal iliac branch was 97.1% at 1 month, 93% at 2 months, and 89.0% at 5 years. The average follow-up time was 20.1 ± 26.2 months, during which two (5.9%) deaths occurred. Our initial experience with iliac branch devices was associated with a low complication rate and a favorable outcome, which confirms the midterm success of this intervention.
- Published
- 2022
- Full Text
- View/download PDF
17. Dietary spermidine improves cognitive function
- Author
-
Sabrina Schroeder, Sebastian J. Hofer, Andreas Zimmermann, Raimund Pechlaner, Christopher Dammbrueck, Tobias Pendl, G. Mark Marcello, Viktoria Pogatschnigg, Martina Bergmann, Melanie Müller, Verena Gschiel, Selena Ristic, Jelena Tadic, Keiko Iwata, Gesa Richter, Aitak Farzi, Muammer Üçal, Ute Schäfer, Michael Poglitsch, Philipp Royer, Ronald Mekis, Marlene Agreiter, Regine C. Tölle, Péter Sótonyi, Johann Willeit, Barbara Mairhofer, Helga Niederkofler, Irmgard Pallhuber, Gregorio Rungger, Herbert Tilg, Michaela Defrancesco, Josef Marksteiner, Frank Sinner, Christoph Magnes, Thomas R. Pieber, Peter Holzer, Guido Kroemer, Didac Carmona-Gutierrez, Luca Scorrano, Jörn Dengjel, Tobias Madl, Simon Sedej, Stephan J. Sigrist, Bence Rácz, Stefan Kiechl, Tobias Eisenberg, and Frank Madeo
- Subjects
dietary spermidine ,aging ,cognitive function ,memory ,autophagy ,mitophagy ,Biology (General) ,QH301-705.5 - Abstract
Summary: Decreased cognitive performance is a hallmark of brain aging, but the underlying mechanisms and potential therapeutic avenues remain poorly understood. Recent studies have revealed health-protective and lifespan-extending effects of dietary spermidine, a natural autophagy-promoting polyamine. Here, we show that dietary spermidine passes the blood-brain barrier in mice and increases hippocampal eIF5A hypusination and mitochondrial function. Spermidine feeding in aged mice affects behavior in homecage environment tasks, improves spatial learning, and increases hippocampal respiratory competence. In a Drosophila aging model, spermidine boosts mitochondrial respiratory capacity, an effect that requires the autophagy regulator Atg7 and the mitophagy mediators Parkin and Pink1. Neuron-specific Pink1 knockdown abolishes spermidine-induced improvement of olfactory associative learning. This suggests that the maintenance of mitochondrial and autophagic function is essential for enhanced cognition by spermidine feeding. Finally, we show large-scale prospective data linking higher dietary spermidine intake with a reduced risk for cognitive impairment in humans.
- Published
- 2021
- Full Text
- View/download PDF
18. Cryopreservation moderates the thrombogenicity of arterial allografts during storage.
- Author
-
László Hidi, Erzsébet Komorowicz, Gergely Imre Kovács, Zoltán Szeberin, Dávid Garbaisz, Natalia Nikolova, Kiril Tenekedjiev, László Szabó, Krasimir Kolev, and Péter Sótonyi
- Subjects
Medicine ,Science - Abstract
IntroductionManagement of vascular infections represents a major challenge in vascular surgery. The use of cryopreserved vascular allografts could be a feasible therapeutic option, but the optimal conditions for their production and use are not precisely defined.AimsTo evaluate the effects of cryopreservation and the duration of storage on the thrombogenicity of femoral artery allografts.MethodsIn our prospective study, eleven multi-organ-donation-harvested human femoral arteries were examined at five time points during storage at -80°C: before cryopreservation as a fresh native sample and immediately, one, twelve and twenty-four weeks after the cryopreservation. Cross-sections of allografts were perfused with heparin-anticoagulated blood at shear-rates relevant to medium-sized arteries. The deposited platelets and fibrin were immunostained. The thrombogenicity of the intima, media and adventitia layers of the artery grafts was assessed quantitatively from the relative area covered by fibrin- and platelet-related fluorescent signal in the confocal micrographs.ResultsRegression analysis of the fibrin and platelet coverage in the course of the 24-week storage excluded the possibility for increase in the graft thrombogenicity in the course of time and supported the hypothesis for a descending trend in fibrin generation and platelet deposition on the arterial wall. The fibrin deposition in the cryopreserved samples did not exceed the level detected in any of the three layers of the native graft. However, an early (up to week 12) shift above the native sample level was observed in the platelet adhesion to the media.ConclusionsThe hemostatic potential of cryopreserved arterial allografts was retained, whereas their thrombogenic potential declined during the 6-month storage. The only transient prothrombotic change was observed in the media layer, where the platelet deposition exceeded that of the fresh native grafts in the initial twelve weeks after cryopreservation, suggesting a potential clinical benefit from antiplatelet therapy in this time-window.
- Published
- 2021
- Full Text
- View/download PDF
19. Complex Aortic Interventions Can Be Safely Introduced to the Clinical Practice by Physicians Skilled in Basic Endovascular Techniques
- Author
-
Sarolta Borzsák, András Szentiványi, András Süvegh, Daniele Mariastefano Fontanini, Milán Vecsey-Nagy, Péter Banga, Zoltán Szeberin, Péter Sótonyi, and Csaba Csobay-Novák
- Subjects
aortic aneurysm ,endovascular aneurysm repair ,stentgraft ,fenestrated ,branched ,Science - Abstract
Our purpose was to evaluate the risk associated with the learning curve of starting a complex aortic programme in an Eastern European country. A retrospective study was conducted involving the initial 20 patients (16 males, mean age: 65 ± 11 years) undergoing fenestrated/branched endovascular aortic repair in a single centre. Demographic, anatomical, procedural, and postoperative variables were collected. Our elective patient cohort consisted of 9 pararenal aneurysms (45%) and 11 thoracoabdominal aortic aneurysms (55%), with the latter including 4 chronic dissection cases (20%). A total of 71 branch vessels were incorporated (3.5 ± 0.9 per patient). The per vessel technical success rate was 100%. In-hospital mortality was 5% (1/20). At an average follow-up of 14 ± 22 months, the primary clinical success rate was 45% (9/20) and the secondary clinical success was achieved in 75% of cases (15/20). All-cause mortality at 14 months was 20% (4/20; aortic related: 1/20, 5%). Four bridging stent occlusions were found (5.6%). Mortality and reintervention rates were comparable to the initial results of high-volume centres, while the complexity of our cases and the per vessel technical success rate was comparable to the values reported as late experience. The morbidity of the learning curve could be decreased if operators are skilled in basic endovascular procedures.
- Published
- 2022
- Full Text
- View/download PDF
20. Initial evidence of a 50% reduction of contrast media using digital variance angiography in endovascular carotid interventions
- Author
-
Viktor I. Óriás, Dávid Szöllősi, Marcell Gyánó, Dániel S. Veres, Sándor Nardai, Csaba Csobay-Novák, Balázs Nemes, János P Kiss, Krisztián Szigeti, Szabolcs Osváth, Péter Sótonyi, and Zoltán Ruzsa
- Subjects
Digital variance angiography ,Digital subtraction angiography ,Carotid artery disease ,Iodinated contrast media ,Dose management ,Safety ,Medical physics. Medical radiology. Nuclear medicine ,R895-920 - Abstract
Purpose: In previous clinical studies Digital Variance Angiography (DVA) provided higher signal-to-noise ratio (SNR) and better image quality than Digital Subtraction Angiography (DSA). Our aim was to investigate whether this quality reserve of DVA provides an opportunity for the reduction of iodinated contrast media (ICM) in carotid X-ray angiography (CXA). Method: Our prospective study enrolled 26 patients (67.0 ± 8.1 years) undergoing carotid percutaneous transluminal angioplasty. The SNR of DSA and DVA image pairs obtained by a standard (100 %, 6 mL ICM) or a low-dose (50 %, 3 mL ICM) protocol were compared. Visual evaluation of all images was performed by five specialists using a 5-grade rating scale. The quality of DSA100 and DVA50 videos was also compared. Results: DVA provided more than two-fold SNR, the median SNRDVA/SNRDSA ratio was 2.06 (100 %) and 2.25 (50 %). In the visual evaluation, the DVA100 score (3.73 ± 0.06) was significantly higher than the DSA100 score (3.52 ± 0.07, Wilcoxon p
- Published
- 2020
- Full Text
- View/download PDF
21. Comparison of Manual versus Semi-Automatic Segmentations of the Stenotic Carotid Artery Bifurcation
- Author
-
Benjamin Csippa, Zsuzsanna Mihály, Zsófia Czinege, Márton Bence Németh, Gábor Halász, György Paál, and Péter Sótonyi
- Subjects
three-dimensional imaging ,computer-assisted image processing ,carotid artery stenosis ,computed tomography angiography ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
Background: The image reconstruction of stenotic carotid bifurcation can be managed by medical practitioners and non-medical investigators with semi-automatic or manual segmentation. The outcome of blood flow simulations may vary because of a single mean voxel difference along the examined section, possibly more in the stenotic lesions, which can lead to conflicting results regarding other research findings. The aim of our project is computational geometry reconstruction for blood flow simulations to make it suitable for comparison with plaque image analysis performed by commercially available software. In this paper, a comparison is made between the manual and semi-automatic segmentations performed by non-medical and medical investigators, respectively. Methods: 30 patients were classified into three homogeneous groups. Our group classification was based on the following parameters: plaque calcification score, thickness, extent, remodeling and plaque localization. The images in the first group were segmented individually by medical practitioners and experienced non-medical investigators, the second group was segmented collectively, and the last group was segmented individually again. Cross-sections along the centerline were extracted, then geometrical and statistical analyses were performed. Exploratory flow simulations were carried out on two patients to showcase the effect of geometrical differences on the hemodynamic flow field. Results: The largest centerline-averaged voxel difference between the medical and non-medical investigators occurred in the first group with a positive difference of 1.16 voxels. In the second and third groups, the average voxel difference decreased to 0.65 and 0.75, respectively. The example case from the first group showed that the difference in maximum wall shear stress in the middle of the stenosis is 30% with an average voxel difference of 1.73. Meanwhile, it can decrease to 4% when the average voxel difference is 0.64 for the example case from the third group. Conclusions: A collective review of the medical images should preceded the manual segmentations before applying them in computational simulations in order to ensure a proper comparison with plaque image analysis. Especially complex pathology such as calcifications should be segmented under medical supervision or after specific training. Non-significant differences in the segmentation can lead to significant differences in the computed flow field.
- Published
- 2021
- Full Text
- View/download PDF
22. Ultrastructural abnormalities in CA1 hippocampus caused by deletion of the actin regulator WAVE-1.
- Author
-
Diána Hazai, Róbert Szudoczki, Jindong Ding, Scott H Soderling, Richard J Weinberg, Péter Sótonyi, and Bence Rácz
- Subjects
Medicine ,Science - Abstract
By conveying signals from the small GTPase family of proteins to the Arp2/3 complex, proteins of the WAVE family facilitate actin remodeling. The WAVE-1 isoform is expressed at high levels in brain, where it plays a role in normal synaptic processing, and is implicated in hippocampus-dependent memory retention. We used electron microscopy to determine whether synaptic structure is modified in the hippocampus of WAVE-1 knockout mice, focusing on the neuropil of CA1 stratum radiatum. Mice lacking WAVE-1 exhibited alterations in the morphology of both axon terminals and dendritic spines; the relationship between the synaptic partners was also modified. The abnormal synaptic morphology we observed suggests that signaling through WAVE-1 plays a critical role in establishing normal synaptic architecture in the rodent hippocampus.
- Published
- 2013
- Full Text
- View/download PDF
23. The effect of carotid endarterectomy on cognitive function regarding cerebral hypoperfusion
- Author
-
SÁNDOR, Ágnes Dóra, primary, SZABÓ, András, additional, ESZTER, Losoncz, additional, ZSÓFIA, Czinege, additional, ZSUZSANNA, Mihály, additional, PÉTER, Sótonyi, additional, and ANDREA, Székely, additional
- Published
- 2023
- Full Text
- View/download PDF
24. Central arterial pressure estimation based on two peripheral pressure measurements using one-dimensional blood flow simulation
- Author
-
Dániel Gyürki, Péter Sótonyi, and György Paál
- Subjects
Human-Computer Interaction ,Biomedical Engineering ,Bioengineering ,General Medicine ,Computer Science Applications - Published
- 2023
- Full Text
- View/download PDF
25. Komplex endovascularis rekonstrukciók az aortaíven
- Author
-
Martin Gellért Nagy, Artúr Hüttl, Sarolta Borzsák, Miklós Pólos, Zoltán Szabolcs, Gergely Csikós, Zoltán Szeberin, Péter Sótonyi, and Csaba Csobay-Novák
- Subjects
General Medicine - Abstract
Az aortaívet érintő aortabetegségek miatt végzett endovascularis rekonstrukciók (thoracic endovascular aneurysm repair – TEVAR) során a sztentgraft proximalis rögzítése az ívben vagy az aorta ascendensen van. Ilyen esetben hagyományosan nyitott műtéttel előzetesen biztosítjuk a lefedésre kerülő supraaorticus ágak keringését (ún. ’debranching’ műtétek). Nyitott műtétre nem alkalmas betegek esetén azonban az ágak endovascularis módszerekkel történő megtartására kényszerülünk. Tanulmányunkban ezen komplex endovascularis aortaív-rekonstrukciók lehetőségeit mutatjuk be. A párhuzamos graftokat jellemzően sürgősségi körülmények között alkalmazzuk. Az ascendensen történő proximalis rögzítés esetén a jobb arteria (a.) carotisról indított ’debranching’ és a truncus brachiocephalicus párhuzamos grafttal történő biztosításával kombinált hibrid műtétet végeztünk. Létfontosságú ér véletlen lefedésével járó TEVAR esetén sürgősséggel végezhetünk konverziót például a bal a. carotis communis keringésének gyors helyreállítására. A bal a. subclavia előzetes revascularisatiója nélkül végzett sürgősségi TEVAR után ritkán jelentkező bal felső végtagi ischaemia esetén utólagos konverziót végezhetünk a bal a. subclavia lumenének helyreállítására ugyancsak párhuzamos grafttal. A kisgörbületen elhelyezkedő, saccularis morfológiájú penetráló aortafekélyek sikeres kirekesztését segítheti egyedi gyártású graft alkalmazása, melyen a nagygörbületen lévő supraaorticus érszájadék köré kivágást, ún. ’scallop’-ot helyezünk a graft proximalis végéhez, megnövelve így a proximalis nyak hosszát. Elektív körülmények között ugyancsak egyedileg gyártott elágazó graftot is alkalmazhatunk, melynek során akár mindhárom ág megtartható az ascendensről induló proximalis rögzítés mellett, így arra alkalmas anatómia esetén endovascularis ívcserére is lehetőségünk van. Orv Hetil. 2023; 164(11): 426–431.
- Published
- 2023
- Full Text
- View/download PDF
26. Dynamic Computed Tomography Angiography is More Accurate in Diagnosing Endoleaks than Standard Triphasic Computed Tomography Angiography and Enables Targeted Embolization
- Author
-
Marton Berczeli, Ponraj Chinnadurai, Peter Osztrogonácz, Eric K. Peden, Charudatta S. Bavare, Péter Sótonyi, Su Min Chang, and Alan B. Lumsden
- Subjects
Surgery ,General Medicine ,Cardiology and Cardiovascular Medicine - Abstract
The primary objective was to compare the accuracy of dynamic computed tomography (CT) angiography (d-CTA) with standardized triphasic contrast enhanced CT angiography (t-CTA) in diagnosing endoleak type after endovascular aortic repair (EVAR) using digital subtraction angiography (DSA) as reference standard. The secondary objective was to study the impact of d-CTA on image fusion-guided endoleak embolization.A retrospective review of patients who underwent d-CTA imaging after EVAR between March 2019 and July 2021 was performed. Deidentified images were independently reviewed by two-two blinded readers to document endoleak type and target vessels. An impact of d-CTA-guided embolization was evaluated by a number of planning angiograms, radiation exposure, and accuracy of target vessel overlay.During the study period, 52 patients underwent d-CTA and 19 had all 3 modalities available for analysis. DSA imaging confirmed 4 (21.0%) type-I, 14 (73.7%) type-II, and 1 (5.3%) type-III endoleak. Findings from d-CTA matched with DSA in 19/19 cases (100%), whereas t-CTA matched in 14/19 cases (73.7%). In type-II endoleaks, the number of target vessels identified by d-CTA, t-CTA, and DSA were 23, 17, and 16, respectively. Mean dose-length product from d-CTA and t-CTA was 1,445 ± 551 and 1,612 ± 530 mGy × cm (P = 0.26). Nine patients underwent d-CTA-guided type-II endoleak embolization, using a median of 1 (range: 1-4) planning angiogram before embolization using 21.6 (± 8.7)% of total procedural radiation dose. Target vessel overlay was accurate in 9/9 (100%) cases.Dynamic, time-resolved CTA is more accurate compared to standardized triphasic contrast enhanced CTA in diagnosing endoleak type after EVAR. In type-II endoleak, d-CTA better identified target vessels and enabled safe, targeted embolization.
- Published
- 2023
- Full Text
- View/download PDF
27. Closed-Ring Reinforcement for Physician-Modified Endograft Fenestrations
- Author
-
Csaba Csobay-Novák, Sarolta Borzsák, Artúr Hüttl, István Szilvácsku, Dóra Kovács, János Dobránszky, and Péter Sótonyi
- Subjects
Radiology, Nuclear Medicine and imaging ,Cardiology and Cardiovascular Medicine - Published
- 2023
- Full Text
- View/download PDF
28. NB-SQI: A novel non-binary signal quality index for continuous blood pressure waveforms.
- Author
-
Anna Ignácz, Sándor Földi, Péter Sótonyi, and György Cserey
- Published
- 2021
- Full Text
- View/download PDF
29. A Propensity-Matched Comparison of Ischemic Brain Lesions on Postprocedural MRI in Endovascular versus Open Carotid Artery Reconstruction
- Author
-
Varga, Zsuzsanna Mihály, Samuel Booth, Dat Tin Nguyen, Milán Vecsey-Nagy, Miklós Vértes, Zsófia Czinege, Csongor Péter, Péter Sótonyi, and Andrea
- Subjects
carotid artery stenosis ,carotid artery stenting ,carotid artery endarterectomy ,ischemic brain lesions ,carotid plaque features ,ct angiography ,cardiovascular imaging - Abstract
(1) Study purpose: The aim of our prospective single-center, matched case–control study was to compare the number and volume of acute ischemic brain lesions following carotid endarterectomy (CEA) versus carotid artery stenting (CAS) using a propensity-matched design. (2) Methods: Carotid bifurcation plaques were analyzed by using VascuCAP software on CT angiography (CTA) images. The number and volume of acute and chronic ischemic brain lesions were assessed on MRI scans taken 12–48 h after the procedures. Propensity score-based matching was performed at a 1:1 ratio to compare the ischemic lesions on postinterventional MR. (3) Results: A total of 107 patients (CAS, N = 33; CEA, N = 74) were included in the study. There were significant differences in smoking (p = 0.003), total calcification plaque volume (p = 0.004), and lengths of the lesion (p = 0.045) between the CAS and CEA groups. Propensity score matching resulted in 21 matched pairs of patients. Acute ischemic brain lesions were detected in ten patients (47.6%) of the matched CAS group and in three patients (14.2%) in the matched CEA group (p = 0.02). The volume of acute ischemic brain lesions was significantly larger (p = 0.04) in the CAS group than in the CEA group. New ischemic brain lesions were not associated with neurological symptoms in either group. (4) Conclusions: Procedure-related new acute ischemic brain lesions occurred significantly more frequently in the propensity-matched CAS group.
- Published
- 2023
- Full Text
- View/download PDF
30. Krónikus aortadissectio talaján kialakult tartott ruptura endovascularis műtéte elágazó grafttal
- Author
-
Csaba Csobay-Novák, Ákos Pataki, Daniele Mariastefano Fontanini, Sarolta Borzsák, Péter Banga, and Péter Sótonyi
- Subjects
General Medicine - Abstract
Az aortadissectio késői szövődménye a meggyengült érfal tágulata. Ennek megoldására sürgető helyzetben a nagy kockázatú nyitott műtét endovascularis alternatívájaként csak elágazó graft implantációja (branched endovascular aortic repair – BEVAR) jön szóba, melynek beültetését azonban extrém mértékben megnehezíti az aorta lumenében elhelyezkedő intimamembrán, illetve a valódi lumen jellemzően nagyfokú kompressziója. Közleményünkben a BEVAR aortadissectio esetén történő első hazai alkalmazását mutatjuk be. 76 éves férfi betegünk 13 évvel korábban szenvedett el B-típusú aortadissectiót, mely miatt supraaorticus debranching műtétet követően thoracalis sztentgraft-implantációt végeztek. Jelen felvételére heveny mellkasi fájdalom miatt került sor, melynek hátterében a thoracoabdominalis aorta tíz centiméteres tágulatának „tartott” (a haematomát a retroperitoneum tartja) rupturája állt. A bal a. subclavia proximalis szakaszának szelektív embolisatióját követően komplex aortaintervenciót végeztünk. Az in situ thoracalis graftból indított újabb thoracalis sztentgraftot, majd elágazó thoracoabdominalis graftot ültettünk be, melynek négy ágát a truncus coeliacusra, az a. mesenterica superiorra, valamint a két veseartériára vezettük. Az elágazó graft alá bifurkációs graftot, a bal a. iliaca rendszer komplex dissectiója miatt bal oldalra iliacabifurkációs graftot is implantáltunk. Szövődménymentes beavatkozást követően a beteget a 4. posztoperatív napon otthonába bocsátottuk. Orv Hetil. 2022; 163(22): 886–890.
- Published
- 2022
- Full Text
- View/download PDF
31. Az endocsavarozás hatékony lehet a juxtarenalis aortaaneurysmák endovascularis kezelésében
- Author
-
Daniele Mariastefano Fontanini, Sarolta Borzsák, Milán Vecsey-Nagy, Zsófia Jokkel, Zoltán Szeberin, András Szentiványi, András Süvegh, Péter Sótonyi, and Csaba Csobay-Novák
- Subjects
General Medicine - Abstract
Összefoglaló. Bevezetés: Az infrarenalis aortaaneurysmák kezelésére alkalmazott endovascularis aortarekonstrukció (EVAR) hosszú távú sikerének egyik meghatározó tényezője a proximalis rögzítés minősége. A proximalis rögzítés minőségét rontó, ún. nehéz nyakkal rendelkező aneurysmák sikeres kezelésére fejlesztették ki az endocsavarozást, melynek során apró fémspirálokkal rögzítjük a beültetett sztentgraftot az aorta falához. Célkitűzés: Vizsgálatunk célja, hogy hazai beteganyagon elemezzük az endocsavarozással kiegészített EVAR-műtétek perioperatív és középtávú kockázatát. Módszerek: Retrospektív vizsgálatunk során a profilaktikus endocsavarozással kiegészített EVAR-műtéten átesett betegek adatainak analízisét végeztük. Demográfiai és kórelőzményi adatok, a műtétek és a kontrollvizsgálatok, illetve a képalkotó vizsgálatok eredményeit vizsgáltuk. Eredmények: 2019. január 1. és 2021. szeptember 30. között 14 esetben (11 férfi, átlagéletkor 70,4 ± 8,1 év) végeztünk profilaktikus endocsavarozással kiegészített EVAR-műtétet. Az esetek 86%-ában (12/14) nehéz nyak miatt történt az endocsavarozás, átlagosan 6,4 ± 1,7 csavar felhasználásával. Technikai szövődmény nem lépett fel. A 7,0 ± 9,9 hónapos átlagos követési idő alatt mechanikai szövődményt, tartós Ia típusú endoleaket nem észleltünk. Reintervenció nem történt. A követés alatt egy beteget vesztettünk el aortával nem összefüggő betegségben, így a mortalitási arány 7% (1/14), a klinikai sikerarány 92,9% (13/14). Megbeszélés: Az Európai Érsebészeti Társaság által 2019-ben kiadott irányelv az endocsavarok alkalmazását randomizált vizsgálat hiányában csak klinikai vizsgálat keretében javasolja. A közelmúltban megjelent metaanalízis, illetve nemzetközi regiszter adatain alapuló publikáció eredményeivel összhangban jelen vizsgálatunk során is 90% feletti technikai sikerarányt, alacsony komplikációs rátát és magas Ia endoleak mentességet találtunk. Következtetés: Nagy kockázatú betegcsoporton igazoltuk a Medtronic Heli-FX rendszer hatékonyságát. A módszer sikeresen és biztonságosan alkalmazható nehéz nyakkal komplikált infrarenalis aneurysmák endovascularis kezelésére. Orv Hetil. 2022; 163(16): 631–636. Summary. Introduction: Endosuturing, which involves the use of metal screws to fix the implanted stent graft to the aortic wall, was developed as an adjunctive procedure of endovascular aortic repair (EVAR) to treat aneurysms with hostile neck. Objective: The aim of our study was to analyse the perioperative and mid-term risk of EVAR surgery with endosuturing in a Hungarian patient population. Methods: In our retrospective study, we analysed data from patients undergoing EVAR surgery augmented with prophylactic endosuturing. Demographic and anamnestic data, results of surgery and follow-up examinations and imaging studies were analyzed. Results: Between January 1, 2019 and September 30, 2021, 14 cases (11 men, mean age 70.4 ± 8.1 years) underwent EVAR surgery with prophylactic endosuturing. In 86% of cases (12/14), endosuturing was performed due to a hostile neck, using an average of 6.4 ± 1.7 screws. No technical complications occurred. No mechanical complications or persistent Ia endoleak were observed during the mean follow-up of 7.0 ± 9.9 months. Reintervention did not occur. One patient was lost during follow-up due to a disease unrelated to the aorta, resulting in a mortality rate of 7% (1/14) and a clinical success rate of 92.9% (13/14). Discussion: In accordance with recent publications, we found a low complication rate and a technical success rate above 90%. Conclusion: We demonstrated the efficacy of the Medtronic Heli-FX system in a high-risk patient population. The technique can be successfully and safely used for endovascular treatment of infrarenal aneurysms complicated with hostile neck. Orv Hetil. 2022; 163(16): 631–636.
- Published
- 2022
- Full Text
- View/download PDF
32. Digital variance angiography allows about 70% decrease of DSA-related radiation exposure in lower limb X-ray angiography
- Author
-
Dániel S. Veres, Ákos Pataki, Márton Berczeli, Krisztián Szigeti, Dávid Szöllősi, Szabolcs Osváth, István Góg, Viktor Óriás, János Kiss, Marcell Gyánó, Péter Sótonyi, Balázs Nemes, Csaba Csobay-Novák, Viktória Juhász, and Zoltán Oláh
- Subjects
Male ,Radiography, Abdominal ,Medical staff ,Arterial disease ,Science ,Signal-To-Noise Ratio ,Radiation Dosage ,Article ,Lower limb X-ray ,medicine ,Humans ,Prospective Studies ,Prospective cohort study ,Aged ,Aged, 80 and over ,Peripheral Vascular Diseases ,Leg ,Multidisciplinary ,medicine.diagnostic_test ,business.industry ,Significant difference ,Angiography, Digital Subtraction ,Digital subtraction angiography ,Middle Aged ,Radiography ,Radiation exposure ,Peripheral vascular disease ,Angiography ,Medicine ,Female ,business ,Nuclear medicine - Abstract
Our aim was to investigate whether the previously observed higher contrast-to-noise ratio (CNR) and better image quality of Digital Variance Angiography (DVA) - compared to Digital Subtraction Angiography (DSA) - can be used to reduce radiation exposure in lower limb X-ray angiography. This prospective study enrolled 30 peripheral artery disease patients (mean ± SD age 70 ± 8 years) undergoing diagnostic angiography. In all patients, both normal (1.2 µGy/frame; 100%) and low-dose (0.36 µGy/frame; 30%) protocols were used for the acquisition of images in three anatomical regions (abdominal, femoral, crural). The CNR of DSA and DVA images were calculated, and the visual quality was evaluated by seven specialists using a 5-grade Likert scale. For investigating non-inferiority, the difference of low-dose DVA and normal dose DSA scores (DVA30-DSA100) was analyzed. DVA produced two- to three-fold CNR and significantly higher visual score than DSA. DVA30 proved to be superior to DSA100 in the crural region (difference 0.25 ± 0.07, p p = 0.435) and abdominal (− 0.10 ± 0.09, p = 0.350) regions. Our data show that DVA allows about 70% reduction of DSA-related radiation exposure in lower limb X-ray angiography, providing a potential new radiation protection tool for the patients and the medical staff.
- Published
- 2021
33. Imaging retinal microvascular manifestations of carotid artery disease in older adults: from diagnosis of ocular complications to understanding microvascular contributions to cognitive impairment
- Author
-
Ágnes Élő, Anna Csiszar, Cecília Czakó, Andriy Yabluchanskiy, Péter Sótonyi, Andrea Varga, Shannon M. Conley, Zsuzsanna Mihály, Agnes Lipecz, Zoltán Zsolt Nagy, Illés Kovács, Lilla István, Tamás Csipő, and Zoltan Ungvari
- Subjects
Carotid Artery Diseases ,Aging ,medicine.medical_specialty ,Review ,Retinal biomarkers ,030204 cardiovascular system & hematology ,Vascular dementia ,Retina ,03 medical and health sciences ,Cerebral circulation ,chemistry.chemical_compound ,0302 clinical medicine ,Internal medicine ,Carotid artery disease ,medicine ,Humans ,Cognitive Dysfunction ,Carotid artery stenosis ,Cognitive decline ,Aged ,medicine.diagnostic_test ,business.industry ,Microcirculation ,Retinal imaging ,Retinal Vessels ,OCT angiography ,Retinal ,VCID ,medicine.disease ,Fluorescein angiography ,eye diseases ,Stenosis ,medicine.anatomical_structure ,chemistry ,Cardiology ,Geriatrics and Gerontology ,business ,030217 neurology & neurosurgery - Abstract
Carotid artery stenosis (CAS) is a consequence of systemic atherosclerotic disease affecting the aging populations of the Western world. CAS is frequently associated with cognitive impairment. However, the mechanisms contributing to the development of vascular cognitive impairment (VCI) associated with CAS are multifaceted and not fully understood. In addition to embolization and decreased blood flow due to the atherosclerotic lesion in the carotid artery, microcirculatory dysfunction in the cerebral circulation also plays a critical role in CAS-related VCI. To better understand the microvascular contributions to cognitive decline associated with CAS and evaluate microvascular protective effects of therapeutic interventions, it is essential to examine the structural and functional changes of the microvessels in the central nervous system (CNS). However, there are some limitations of in vivo brain vascular imaging modalities. The retinal microvasculature provides a unique opportunity to study pathogenesis of cerebral small vessel disease and VCI, because the cerebral circulation and the retinal circulation share similar anatomy, physiology and embryology. Similar microvascular pathologies may manifest in the brain and the retina, thus ocular examination can be used as a noninvasive screening tool to investigate pathological changes in the CNS associated with CAS. In this review, ocular signs of CAS and the retinal manifestations of CAS-associated microvascular dysfunction are discussed. The advantages and limitation of methods that are capable of imaging the ocular circulation (including funduscopy, fluorescein angiography, Doppler sonography, optical coherence tomography [OCT] and optical coherence tomography angiography [OCTA]) are discussed. The potential use of dynamic retinal vessel analysis (DVA), which allows for direct visualization of neurovascular coupling responses in the CNS, for understanding microvascular contributions to cognitive decline in CAS patients is also considered.
- Published
- 2021
- Full Text
- View/download PDF
34. Pulsatile Changes of the Aortic Diameter May Be Irrelevant Regarding Endograft Sizing in Patients With Aortic Disease
- Author
-
Daniele Mariastefano Fontanini, Máté Huber, Milán Vecsey-Nagy, Sarolta Borzsák, Judit Csőre, Péter Sótonyi, and Csaba Csobay-Novák
- Subjects
Radiology, Nuclear Medicine and imaging ,Surgery ,Cardiology and Cardiovascular Medicine - Abstract
Purpose: Endovascular aortic repair has become the preferred elective treatment of infrarenal aortic aneurysms. Aortic pulsatility may pose problems regarding endograft sizing. The aims of this study are to determine the aortic pulsatility in patients with aortic disease and to evaluate the effect of pulsatility on the growth of aneurysms. Materials and Methods: In this retrospective study, analyses of computed tomography angiography (CTA) images of 31 patients under conservative treatment for small abdominal aortic aneurysms were performed. Reconstructions of the raw electrocardiography (ECG) gated dataset at 30% and 90% of the R-R cycle were used. After lumen segmentation, total aortic cross-sectional area was measured in diastole and systole in the following zones: Z0, Z3, Z5, Z6, Z8, and Z9. Effective diameters (EDs) were calculated from the systolic (EDsys) and diastolic (EDdia) cross-sectional areas to determine absolute (EDsys – EDdia, mm) and relative pulsatility [(EDsys – EDdia) / EDdia, %]. Diameter of the aneurysms was measured on baseline images and the last preoperative follow-up study of each patient. Results: A total of 806 measurements were completed, 24 pulsatility and 2 growth measurements per patient. The mean pulsatility values at each point were as follows: Z0: 0.7±0.8 mm, Z3: 1.0±0.6 mm, Z5: 1.0±0.6 mm, Z6: 0.8±0.7 mm, Z8: 0.7±1.0 mm, Z9: 0.9±0.9 mm. Follow-up time was 5.5±2.2 years during which a growth of 13.42±9.09 mm (2.54±1.55 mm yearly) was observed. No correlation was found between pulsatility values and growth rate of the aneurysms. Conclusion: The pulsatility of the aorta is in a submillimetric range for the vast majority of patients with aortic disease, thus probably not relevant regarding endograft sizing. Pulsatility of the ascending aorta is smaller than that of the descending segment, making an additional oversize of a Z0 implantation questionable. Clinical Impact Endovascular aortic repair reqiures precise preoperative planning. Pulsatile changes of the aortic diameter may pose issues regarding endograft sizing. In our retrospective single-centre study, aortic pulsatility of patients with AAA was measured on ECG gated CTA images. Pulsatility values reached a maximum at the descending aorta, however absolute pulsatility values did not exceed 1 mm at any point along the aorta. Therefore, significance of aortic pulsatility regarding the sizing of EVAR prostheses is questionable. Correlation between pulsatility and AAA growth was not found.
- Published
- 2023
- Full Text
- View/download PDF
35. A nyaki verőér-szűkületes betegek ellátási irányelveinek különbségei Európa különböző országaiban
- Author
-
Péter Sótonyi, László Entz, Lilla István, Zsuzsanna Mihály, Endre Kolossváry, Danielle Mariastefano Fontanini, Ágnes Sándor, Gábor Lovas, Edit Dósa, and Illés Kovács
- Subjects
Gynecology ,medicine.medical_specialty ,business.industry ,Symptomatic carotid artery stenosis ,General Medicine ,Amaurosis fugax ,medicine.disease ,Asymptomatic ,03 medical and health sciences ,Stenosis ,0302 clinical medicine ,Embolism ,medicine ,030211 gastroenterology & hepatology ,medicine.symptom ,Asymptomatic carotid artery stenosis ,Monocular Blindness ,business ,Paresis - Abstract
Összefoglaló. A tudomány jelenlegi állása szerint – csoportok összehasonlítására épülő matematikai-statisztikai eszközökkel – a leginkább hatékonynak és hatásosnak vélt kezelési módszerek szisztematikus elemzése mentén, a bizonyítékokon alapuló irányelveken nyugvó gyógyító munkát tekintjük követendőnek. A nyaki verőérszűkület ellátása esetén az utóbbi években elkészült mind a hazai, mind az európai irányelv, mindemellett a társszakmák irányelveiben is megjelentek kezelési javaslatok. Közleményünkben összehasonlítottuk a témában publikált magyar, angol, német és olasz nyelvű, valamint az európai társaságok által kiadott irányelveket. Az irányelvek alapelveikben hasonlóak, formailag és tartalmilag azonban jelentős (időnként egymásnak ellentmondani látszó) különbségeket találhatunk. Az ellentmondások három leggyakoribb oka: 1) az egyes irányelvek által kitűzött célok különbözősége, 2) az aszimptomatikus és szimptomatikus betegcsoport definíciói, valamint 3) az eltérő evidenciaszintek. Az irányelvek összevetése alapján a tünetes, szignifikáns nyaki verőérszűkületek sebészi ellátása evidenciának tekinthető. A szimptomatikus nyaki verőérszűkület a definíció szerint ellenoldali cerebralis ischaemia okozta, tranziens vagy definitív plegia, paresis, aphasia és az azonos oldali arteria centralis retinae embolisatiója miatti amaurosis fugax. A tünetmentes nyaki verőérszűkületek ellátása tekintetében az európai és a nemzeti irányelvek nem azonosak, ezen esetek terápiás döntése egyéni mérlegelést igényel. Tünetmentes, 70%-os stenosis esetén vascularteam-konzílium javasolt. Orv Hetil. 2020; 161(51): 2139–2145. Summary. The correct practice is the one that is proven to be the most effective based on systematic statistical analyses of different treatment methods, and is applied according to evidence-based principles. In recent years, not only has the European Society of Vascular Surgery created a guideline about the management of supra-aortic steno-occlusive disease, but some nations’ vascular surgical societies and related disciplines have also developed their own guidance. In this paper, the guidelines by the European societies on the clinical care of patients with carotid artery luminal narrowing is compared to national guidelines published in Hungarian, English, German, and Italian. Although the fundamental points of the guidelines are similar, there are some important differences among them both in presentation and in content; as a result, they sometimes appear to be contradictory. The three main sources of inconsistency are the various goals, the discrepancy in the definition of symptomatic and asymptomatic carotid artery stenosis, and the bias arising from the use of distinct evidence levels. A comparison of guidelines suggests that the treatment of symptomatic significant carotid artery stenosis with surgery can be considered evidence. Symptomatic carotid artery stenosis is defined as transient or definite plegia, paresis, aphasia due to cerebral ischemia, and monocular blindness caused by embolism in the central retinal artery. However, in the case of asymptomatic 70% or greater carotid artery stenosis, the guidelines are quite heterogeneous, and these patients require individual consideration and a vascular team decision is recommended. Orv Hetil. 2020; 161(51): 2139–2145.
- Published
- 2020
- Full Text
- View/download PDF
36. Nyitott hasi aortaaneurysma-műtétek patkóvese fennállása esetén
- Author
-
Zsuzsanna Mihály, Péter Sótonyi, Sándor Bálint, and Zoltán Oláh
- Subjects
medicine.medical_specialty ,Aorta ,business.industry ,Horseshoe kidney ,General Medicine ,medicine.disease ,Lower limb ischaemia ,Abdominal aortic aneurysm ,Surgery ,Accessory renal artery ,03 medical and health sciences ,Aortic aneurysm ,0302 clinical medicine ,medicine.artery ,medicine ,030211 gastroenterology & hepatology ,Blood supply ,business ,Retroperitoneal approach - Abstract
Összefoglaló. A patkóvese a vese leggyakrabban előforduló fejlődési rendellenességeinek egyike. Hasi aortaaneurysmával való együttes előfordulása kifejezetten ritka (a hasi aortaaneurysmás esetek 0,12%-a). Az első esetben egy 64 éves férfi akut alsó végtagi panaszokkal került felvételre. A CT-angiográfia patkóvesét és thrombotizált infrarenalis aortaaneurysmát igazolt. Az akut műtét során a hasi aortaaneurysma resectióját és aortobifemoralis bypassműtétet végeztünk a patkóvese ishmusának megtartásával. A második esetben hasi panaszokat okozó, mindkét arteria iliaca communisra ráterjedő infrarenalis aortaaneurysma esetén végeztünk aortobiiliacalis rekonstrukciót. Az aneurysma előtt elhelyezkedő isthmus tervezetten szétválasztásra került, a poláris veseartériát visszaültettük. A tünetes hasi aortaaneurysma abszolút műtéti indikációt képez. A preoperatív CT- vagy MR-angiográfia kulcsfontosságú mind a műtéti indikáció felállítása, mind pedig a műtét megtervezése szempontjából. A beavatkozás előtt pontos képet kell kapnia az érsebésznek az aorta anatómiája mellett a patkóvese vérellátásáról és a húgyúti rendszerről. Az érsebészeti rekonstrukció esetén a transperitonealis feltárás – főleg akut műtét esetén – több előnnyel rendelkezik, mint a retroperitonealis feltárás. Orv Hetil. 2020; 161(46): 1966–1971. Summary. Horseshoe kidney is one of the most common congenital disorders of the kidney. The simultaneous incidence of horseshoe kidney and abdominal aneurysm is very low (0.12% of all cases of abdominal aortic aneurysm). In the first case, a 64-year-old male patient was admitted with acute lower limb ischaemia. CT-angiography revealed an occluded aortic aneurysm. During the emergency operation, the abdominal aneurysm was resected and an aortobifemoral bypass procedure was performed sparing the kidney’s isthmus. In the second case, the abdominal complaints were caused by an infrarenal abdominal aneurysm that involved both common iliac arteries. Aortobiiliac reconstruction was performed with planned separation of the kidney isthmus and reimplantation of the accessory renal artery. Symptomatic abdominal aortic aneurysm is an urgent indication for reconstruction. The preoperative CT- or MR-angiography play a key role in the indication and planning of the reconstruction. It is highly important for the vascular surgeon to have a clear picture of the blood supply of the horseshoe kidney and the urinary tract along with the anatomy of the aorta before the operation. The transperitoneal approach has several advantages over the retroperitoneal approach during vascular reconstruction surgery. Orv Hetil. 2020; 161(46): 1966–1971.
- Published
- 2020
- Full Text
- View/download PDF
37. Distal Radial Artery Access for Superficial Femoral Artery Interventions
- Author
-
Mónika Deák, Balázs Nemes, Ádám Csavajda, Zoltán Ruzsa, Béla Merkely, Péter Sótonyi, and Olivier F. Bertrand
- Subjects
medicine.medical_specialty ,medicine.medical_treatment ,Vascular access ,030204 cardiovascular system & hematology ,superficial femoral artery ,03 medical and health sciences ,transradial approach ,Peripheral Arterial Disease ,0302 clinical medicine ,medicine.artery ,Angioplasty ,medicine ,transpedal approach ,Humans ,Radiology, Nuclear Medicine and imaging ,030212 general & internal medicine ,Radial artery ,femoropopliteal segment ,Superficial femoral artery ,business.industry ,Stent ,angioplasty ,vascular access ,Surgery ,Femoral Artery ,medicine.anatomical_structure ,Treatment Outcome ,Radial Artery ,stent ,Stents ,Cardiology and Cardiovascular Medicine ,Complication ,business ,Femoropopliteal Interventions ,Artery - Abstract
Purpose: To compare the acute success and complication rates of distal radial (DR) vs proximal radial (PR) artery access for superficial femoral artery (SFA) interventions. Materials and Methods: Between 2016 and 2019, 195 consecutive patients with symptomatic SFA stenosis were treated via DR (n=38) or PR (n=157) access using a sheathless guide. Secondary access was achieved through the pedal artery when necessary. The main outcomes were technical success, major adverse events (MAEs), and access site complications. Secondary outcomes were treatment success, fluoroscopy time, radiation dose, procedure time, and crossover rate to another puncture site. Results: Overall technical success was achieved in 188 patients (96.4%): 37 of 38 patients (97.3%) in the DR group and 151 of 157 patients (96.2%) in the PR group (p=0.9). Dual (transradial and transpedal) access was used in 14 patients (36.8%) in the DR group and 28 patients (18.9%) in the PR group (pConclusion: SFA interventions can be safely and effectively performed using PR or DR access with acceptable morbidity and a high technical success rate. DR access is associated with few access site complications.
- Published
- 2020
38. Tapasztalataink az alsó végtagi perifériás artériás érbetegség szűréséről az Észak-Magyarország régióban
- Author
-
Gergely Tóth-Vajna, Zsombor Tóth-Vajna, Péter Sótonyi, Zoltán Járai, Brigitta Szilágyi, and Zsuzsanna Gombos
- Subjects
medicine.medical_specialty ,education.field_of_study ,business.industry ,medicine.medical_treatment ,Population ,General Medicine ,False Negative Result ,medicine.disease ,03 medical and health sciences ,0302 clinical medicine ,medicine.anatomical_structure ,Amputation ,Internal medicine ,Diabetes mellitus ,medicine ,Screening method ,030211 gastroenterology & hepatology ,In patient ,Risk factor ,business ,education ,Artery - Abstract
Absztrakt: Bevezetés: A boka-kar index (BKI) mérése az első választandó szűrőmódszer az alsó végtagi perifériás artériás érbetegség (LEAD) diagnosztikájában. A LEAD tekintetében veszélyeztetett populációban végzett szűrés célja a major végtagi események, így az amputáció kockázatának csökkentése. A nyugalmi BKI-érték ugyanakkor könnyen adhat álnegatív eredményt. Célkitűzés: Kutatásunk célja egy, a családorvosi praxisban könnyen megvalósítható, gyors és költséghatékony szűrőmódszer tesztelése mellett azon betegek azonosítása volt, akiknél a családorvos eszközeivel nem kaphatunk definitív diagnózist (negatív BKI mellett tünetes, illetve nem komprimálható artériás csoport). Módszer: Az Észak-Magyarország régióban 680 beteg szűrését végeztük el. Edinburgh-kérdőívet használtunk, rögzítettük a saját és a családi anamnézist, a rizikófaktorokat, a jelenlegi panaszokat és a gyógyszerelést. Fizikális vizsgálatot és BKI-mérést végeztünk. Eredmények: A betegek 34%-a jelzett alsó végtagi claudicatiót, 23%-nak volt abnormális BKI-értéke, 14% jelzett normális BKI-érték mellett dysbasiás panaszokat. 12% került a nem komprimálható artériás csoportba. A BKI alapján negatív, de tünetes csoport rizikófaktor-profilja jelentős hasonlóságot mutatott a biztosan LEAD-pozitív és a nem komprimálható artériás csoport rizikófaktor-profiljával. Következtetés: A LEAD valós előfordulása magasabb lehet, mint a csak a BKI alapján történő szűrés eredménye. A populáció közel negyede került a BKI alapján a negatív, de tünetes és a nem komprimálható artériás csoportba. Ezen csoport betegei a családorvos részéről különös odafigyelést igényelnek. A normális BKI-érték ellenére – ha felmerül a LEAD klinikai gyanúja – további vizsgálatok szükségesek. A LEAD szűrése többirányú megközelítést igényel. Orv Hetil. 2020; 161(33): 1381–1389.
- Published
- 2020
- Full Text
- View/download PDF
39. Az amputációk területi gyakorisága társadalmi és ellátórendszeri összefüggésben Magyarországon 2016–2017-ben
- Author
-
Csaba Dózsa, R Kövi, Petra Fadgyas-Freyler, Balázs Nemes, Adrienn Herczeg, Gyula Korponai, Zsombor Tóth-Vajna, Péter Sótonyi, and Zoltán Szeberin
- Subjects
education.field_of_study ,Descriptive statistics ,business.industry ,medicine.medical_treatment ,Incidence (epidemiology) ,Mortality rate ,Population ,Regression analysis ,General Medicine ,Disease ,03 medical and health sciences ,0302 clinical medicine ,Amputation ,Correlation analysis ,Medicine ,030211 gastroenterology & hepatology ,education ,business ,Demography - Abstract
Absztrakt: Bevezetés és célkitűzés: A perifériás artériás betegségek legnagyobb alcsoportját az alsó végtagi verőérbetegségek képezik, melyek a népesség mintegy 4–6%-ában fordulnak elő. Magyarországon a vizsgált időszakban összesen 6798 major amputációra került sor. Az időben és megfelelő módszerrel elvégzett kezeléssel az alsó végtagi amputációk (melyek 30 napos mortalitása 20%, 2 éves mortalitása pedig 40–60% közötti) száma hatékonyan csökkenthető. Tanulmányunk célja feltárni az ellátásban rejlő területi különbségeket. Módszer: A perifériás erek kezelése finanszírozási adatainak bemutatása során retrospektív adatelemzést végeztünk a Nemzeti Egészségbiztosítási Alapkezelő 2015–2017. évi finanszírozási adatainak felhasználásával. A halálozási arány területi különbségeit leíró statisztikával vizsgáltuk, elemezve a halálozási arányszám és egyéb faktorok közötti esetleges összefüggéseket. Eredmények: A kistérségi – járási szintű – elemzés (n = 174) nagy különbségeket tárt fel az országon belül az amputációk 10 ezer lakosra jutó arányát tekintve. Igazolta, hogy az amputációk döntő többségét a járások 30%-ában végzik, vagyis a kiemelkedő rossz hazai amputációs arányszámot a járások mintegy 30%-ának nagyon kedvezőtlen adata okozza. Regressziós elemzés támasztotta alá a járási szintű, akár négyszeres területi különbségek mögött meghúzódó kapcsolatot az amputációs ráta és az egyes szocioökonómiai tényezők, illetve az endovascularis radiológiai ellátás elérhetősége között. A rétegzett többszörös regressziós elemzés rávilágított arra, hogy azokban a járásokban, ahol nem érhető el az endovascularis ellátás (n = 159), az egyetemi végzettségűek aránya sokkal alacsonyabb (β1 = –0,13, 95% CI: –0,18 – –0,09) és a 65 év felettiek aránya magasabb (β1 = 0,14, 95% CI: 0,03–0,24), ami egymás hatásától függetlenül szignifikánsan befolyásolja az amputációs rátát. Azokban a járásokban viszont, ahol elérhető volt az intervenciós radiológiai ellátás (n = 14), a lakosság életkori megoszlása hatott a leginkább (β1 = 0,7, 95% CI: 0,42–0,98) az amputációk gyakoriságára. Következtetés: Területi és szociális alapon jelentős különbségek tapasztalhatók az országban incidenciában, prevalenciában és halálozási rátában is. A betegség kialakulásában, előrehaladásában erőteljesen megjelennek a szociális, képzettségbeli és jövedelmi különbségek, illetve a lakóhelyközeli ellátóhelyi kapacitások hatása is. Orv Hetil. 2020; 161(18): 747–755.
- Published
- 2020
- Full Text
- View/download PDF
40. Rupturált óriás thoracoabdominalis aortaaneurysma sikeres kezelése két lépésben
- Author
-
Zoltán Oláh, Péter Sótonyi, Márton Berczeli, Lilla Szatai, and László Daróczi
- Subjects
medicine.medical_specialty ,medicine.diagnostic_test ,business.industry ,General Medicine ,Ruptured Aortic Aneurysm ,Vascular surgery ,Hemothorax ,medicine.disease ,Surgery ,03 medical and health sciences ,Aortic aneurysm ,0302 clinical medicine ,Aneurysm ,Angiography ,Back pain ,medicine ,030211 gastroenterology & hepatology ,medicine.symptom ,business ,Spinal cord injury - Abstract
Absztrakt: A thoracoabdominalis aortaaneurysmák kezelése az érsebészet egyik legnagyobb kihívása. Sürgős esetekben ezen komplex aneurysmák endovascularis ellátásának lehetőségei limitáltak. Az óriás méretű (10 cm-t meghaladó) thoracoabdominalis aortaaneurysma rendkívül ritka jelenség, ellátása mindig betegspecifikus, egyedi kezelést igényel. A tervezett kezelés alacsonyabb morbiditási aránnyal jár, különösen a gerincvelő-sérülés tekintetében. Esetünkben egy 19,2 cm maximális átmérőjű, Crawford V típusú thoracoabdominalis aortaaneurysma sikeres kezelését mutatjuk be. A férfi beteget először akutan, nyitottan operáltuk tartott ruptura miatt, majd később halasztott időpontban endovascularisan folytattuk ellátását. A 64 éves férfi beteget mellkasi és hasi panaszok miatt vettük fel intézetünkbe(1) stabil hemodinamikai paraméterekkel. Kontrasztanyagos CT-angiográfiás vizsgálat igazolta a 19,2 cm legnagyobb átmérőjű, többszörös thoracoabdominalis aortaaneurysmáját, kompressziós jelekkel, haemothoraxszal és az alsó szakasz tartott rupturájával. Az anatómia, az extrém méret, a kompressziós tünetek és a haemothorax miatt a nyitott műtéti megoldást választottuk, és intraoperatívan döntöttünk végül a kétszakaszos ellátás mellett. Első lépésben a rupturált szakasz ellátására egy aortoaorticus Dacron interpositumot implantáltunk úgy, hogy a visceralis szakaszt egy ferde ’patch’ segítségével rekonsruáltuk, majd a második lépésben végeztük el a mellkasi sztentgraft beültetését. Az egyéves kontrollon a beteg panaszmentes volt, ’endoleak’ nem ábrázolódott. Az óriás aortaaneurysmák ritka klinikai entitások, főleg a thoracoabdominalis régióban. A kompressziós tünetek, a haemothorax és a jelentős anatómiai változások miatt az endovascularis beavatkozás kivitelezhetősége erősen kérdéses. Ruptura esetén azonnali ellátásuk jelenleg szinte csak nyitottan végezhető. A többlépcsős beavatkozás csökkentheti a gerincvelő-károsodás veszélyét, ezért megfelelő anatómia esetén megfontolandó ennek a ritka betegségnek a kezelésében. Orv Hetil. 2020; 161(7): 269–274.
- Published
- 2020
- Full Text
- View/download PDF
41. Impact of Diabetes Mellitus on Early Clinical Outcome and Stent Restenosis after Carotid Artery Stenting
- Author
-
Alexandru Achim, Dávid Lackó, Artúr Hüttl, Csaba Csobay-Novák, Ádám Csavajda, Péter Sótonyi, Béla Merkely, Balázs Nemes, and Zoltán Ruzsa
- Subjects
Endarterectomy, Carotid ,Time Factors ,Article Subject ,Endocrinology, Diabetes and Metabolism ,Kaplan-Meier Estimate ,Risk Assessment ,Stroke ,Endocrinology ,Carotid Arteries ,Treatment Outcome ,Recurrence ,Risk Factors ,Diabetes Mellitus ,Humans ,Carotid Stenosis ,Stents ,03.02. Klinikai orvostan ,Cardiology and Cardiovascular Medicine ,Retrospective Studies - Abstract
Background. Diabetes mellitus is closely related to both the severity of carotid disease and its outcome after revascularization. Carotid artery stenting (CAS) has emerged as a viable alternative to surgical endarterectomy but little is known about the impact of diabetes after CAS. Methods. A consecutive cohort of 1940 patients undergoing CAS in two institutions was divided into two groups, diabetics and nondiabetics, and major cerebrovascular events (MACCEs) were analyzed at 30 days post-CAS and at 1 year follow-up. Results. There were 730 patients with diabetes, with significantly higher BMI, hypertension, chronic dialysis, and dyslipidemia frequency ( p < 0.05 ). There was no significant difference between the two groups in terms of early and late MACCEs (composite of transient ischemic attack, major stroke, myocardial infarction, and death), with an early rate of 3.5% nondiabetics vs. 5.3%, p = 0.08 and 2.4 nondiabetics vs. 2.3% diabetics, p = 0.1 at 12 months. Overall stroke/death rate in the asymptomatic patients was 2.4%, and the restenosis rate was higher in the diabetes population (2.3% vs. 1%, p = 0.04 ). Conclusion. The presence of diabetes was associated with an acceptable increased periprocedural risk for CAS, but no further additional risk emerged during longer term follow-up. Diabetes may precipitate the rate of early in-stent restenosis.
- Published
- 2021
42. Branched endovascular aortic repair of a contained rupture in chronic aortic dissection
- Author
-
Csaba, Csobay-Novák, Ákos, Pataki, Daniele Mariastefano, Fontanini, Sarolta, Borzsák, Péter, Banga, and Péter, Sótonyi
- Subjects
Male ,Aortic Dissection ,Blood Vessel Prosthesis Implantation ,Treatment Outcome ,Aortic Aneurysm, Thoracic ,Endovascular Procedures ,Humans ,Stents ,Prosthesis Design ,Aged ,Blood Vessel Prosthesis ,Retrospective Studies - Abstract
A late complication of aortic dissection is the dilatation of the weakened aortic wall. The only urgent endovascular alternative to high-risk open surgery in the treatment of postdissection aneurysms is branched endovascular aortic repair (BEVAR), which is extremely difficult due to the intimal membrane in the aorta lumen and the compressed true lumen. In this case report, we present the first application of BEVAR for aortic dissection in Hungary. Our 76-year-old male patient underwent type B aortic dissection 13 years before, for which supraaortic debranching was followed by thoracic stent graft implantation. The patient was admitted with acute chest pain associated with a con-tained rupture of a ten centimetre dilatation of the thoracoabdominal aorta. Our aortic team recommended endo-vascular surgery due to the extremely high risk of open surgery, which the patient accepted. Following selective embolization of the proximal segment of the left subclavian artery, a complex aortic intervention was performed. A new thoracic stent graft was started from the in situ thoracic graft, followed by a branched thoracoabdominal graft, the four branches of which were connected to the celiac trunk, the superior mesenteric artery and the two renal arter-ies. We also implanted a bifurcation graft under the branched graft and a left iliac bifurcation graft due to the complex dissection of the left iliac artery system. After an uneventful procedure, the patient was discharged home on the fourth postoperative day.Az aortadissectio késői szövődménye a meggyengült érfal tágulata. Ennek megoldására sürgető helyzetben a nagy kockázatú nyitott műtét endovascularis alternatívájaként csak elágazó graft implantációja (branched endovascular aortic repair – BEVAR) jön szóba, melynek beültetését azonban extrém mértékben megnehezíti az aorta lumenében elhelyezkedő intimamembrán, illetve a valódi lumen jellemzően nagyfokú kompressziója. Közleményünkben a BEVAR aortadissectio esetén történő első hazai alkalmazását mutatjuk be. 76 éves férfi betegünk 13 évvel korábban szenvedett el B-típusú aortadissectiót, mely miatt supraaorticus debranching műtétet követően thoracalis sztentgraft-implantációt végeztek. Jelen felvételére heveny mellkasi fájdalom miatt került sor, melynek hátterében a thoracoabdominalis aorta tíz centiméteres tágulatának „tartott” (a haematomát a retroperitoneum tartja) rupturája állt. A bal a. subclavia proximalis szakaszának szelektív embolisatióját követően komplex aortaintervenciót végeztünk. Az
- Published
- 2021
43. Endoanchoring may be effective in the endovascular aortic repair of juxtarenal aneurysms
- Author
-
Daniele Mariastefano, Fontanini, Sarolta, Borzsák, Milán, Vecsey-Nagy, Zsófia, Jokkel, Zoltán, Szeberin, András, Szentiványi, András, Süvegh, Péter, Sótonyi, and Csaba, Csobay-Novák
- Subjects
Male ,Hungary ,Endoleak ,Risk Factors ,Humans ,Female ,Middle Aged ,Aged ,Retrospective Studies - Abstract
Methods: In our retrospective study, we analysed data from patients undergoing EVAR surgery augmented with prophylactic endosuturing. Demographic and anamnestic data, results of surgery and follow-up examinations and imaging studies were analyzed. Results: Between January 1, 2019 and September 30, 2021, 14 cases (11 men, mean age 70.4 +/- 8.1 years) underwent EVAR surgery with prophylactic endosuturing. In 86% of cases (12/14), endosuturing was performed due to a hostile neck, using an average of 6.4 +/- 1.7 screws. No technical complications occurred. No mechanical complications or persistent Ia endoleak were observed during the mean follow-up of 7.0 +/- 9.9 months. Reintervention did not occur. One patient was lost during follow-up due to a disease unrelated to the aorta, resulting in a mortality rate of 7% (1/14) and a clinical success rate of 92.9% (13/14). Discussion: In accordance with recent publications, we found a low complication rate and a technical success rate above 90%. Conclusion: We demonstrated the efficacy of the Medtronic Heli-FX system in a high-risk patient population. The technique can be successfully and safely used for endovascular treatment of infrarenal aneurysms complicated with hostile neck.Összefoglaló. Bevezetés: Az infrarenalis aortaaneurysmák kezelésére alkalmazott endovascularis aortarekonstrukció (EVAR) hosszú távú sikerének egyik meghatározó tényezője a proximalis rögzítés minősége. A proximalis rögzítés minőségét rontó, ún. nehéz nyakkal rendelkező aneurysmák sikeres kezelésére fejlesztették ki az endocsavarozást, melynek során apró fémspirálokkal rögzítjük a beültetett sztentgraftot az aorta falához. Célkitűzés: Vizsgálatunk célja, hogy hazai beteganyagon elemezzük az endocsavarozással kiegészített EVAR-műtétek perioperatív és középtávú kockázatát. Módszerek: Retrospektív vizsgálatunk során a profilaktikus endocsavarozással kiegészített EVAR-műtéten átesett betegek adatainak analízisét végeztük. Demográfiai és kórelőzményi adatok, a műtétek és a kontrollvizsgálatok, illetve a képalkotó vizsgálatok eredményeit vizsgáltuk. Eredmények: 2019. január 1. és 2021. szeptember 30. között 14 esetben (11 férfi, átlagéletkor 70,4 ± 8,1 év) végeztünk profilaktikus endocsavarozással kiegészített EVAR-műtétet. Az esetek 86%-ában (12/14) nehéz nyak miatt történt az endocsavarozás, átlagosan 6,4 ± 1,7 csavar felhasználásával. Technikai szövődmény nem lépett fel. A 7,0 ± 9,9 hónapos átlagos követési idő alatt mechanikai szövődményt, tartós Ia típusú endoleaket nem észleltünk. Reintervenció nem történt. A követés alatt egy beteget vesztettünk el aortával nem összefüggő betegségben, így a mortalitási arány 7% (1/14), a klinikai sikerarány 92,9% (13/14). Megbeszélés: Az Európai Érsebészeti Társaság által 2019-ben kiadott irányelv az endocsavarok alkalmazását randomizált vizsgálat hiányában csak klinikai vizsgálat keretében javasolja. A közelmúltban megjelent metaanalízis, illetve nemzetközi regiszter adatain alapuló publikáció eredményeivel összhangban jelen vizsgálatunk során is 90% feletti technikai sikerarányt, alacsony komplikációs rátát és magas Ia endoleak mentességet találtunk. Következtetés: Nagy kockázatú betegcsoporton igazoltuk a Medtronic Heli-FX rendszer hatékonyságát. A módszer sikeresen és biztonságosan alkalmazható nehéz nyakkal komplikált infrarenalis aneurysmák endovascularis kezelésére. Orv Hetil. 2022; 163(16): 631–636.
- Published
- 2021
44. TRIACCESS Study: Randomized Comparison Between Radial, Femoral, and Pedal Access for Percutaneous Femoro-popliteal Artery Angioplasty
- Author
-
Tak W. Kwan, Zoltán Ruzsa, Péter Sótonyi, Béla Merkely, Mónika Deák, Olivier F. Bertrand, Ádám Csavajda, Istvan Hizoh, and Balázs Nemes
- Subjects
Male ,medicine.medical_specialty ,Percutaneous ,Artery angioplasty ,law.invention ,Femoro-popliteal ,Randomized controlled trial ,Femoral access ,law ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Popliteal Artery ,Prospective Studies ,Superficial femoral artery ,business.industry ,Angioplasty ,Surgery ,Femoral Artery ,medicine.anatomical_structure ,Treatment Outcome ,Radial Artery ,Cardiology and Cardiovascular Medicine ,Complication ,business ,Artery - Abstract
Background The aim of this randomized study was to compare the success and complication rates of different access sites for the treatment of superficial artery stenosis. Methods and Results A total of 180 consecutive patients were randomized in a prospective study to treat symptomatic superficial femoral artery stenosis via radial (RA), femoral (FA), or pedal artery (PA) access. Technical success was achieved in 96.7%, 100%, and 100% of the patients in the RA, FA, and PA groups, respectively (p=0.33). Secondary access sites were used in 30%, 3.3%, and 30% of the patients in the RA, FA, and PA access groups, respectively (p=0.0002). Recanalization for chronic total occlusion was performed in 34/36 (94.4%), 30/30 (100%), and 46/46 (100%) patients in the RA, FA, and PA groups, respectively (p=0.17). The X-ray dose was significantly lower in the PA group than that in the RA and FA access groups (63.1 vs 162 vs 153 Dyn, p=0.0004). The cumulative rates of access site complications in the RA, FA, and PA groups were 3.3% (0% major and 3.3% minor), 16.7% (3.3% major and 13.3% minor), and 3.3% (3.3% major and 0% minor) (p=0.0085), respectively. The cumulative incidence of MACEs at 6 months in the RA, FA, and PA groups was 5%, 6.7%, and 1.7%, respectively. The cumulative incidence of MALEs at 6 months in the RA, FA, and PA groups was 20%, 16.7%, and 9.2%, respectively (p=0.54). Conclusion Femoral artery intervention can be safely and effectively performed using radial, femoral, and pedal access, but radial and pedal access is associated with a lower access site complication rate and hospitalization. Pedal access is associated with a lower X-ray dose than that with radial and femoral access.
- Published
- 2021
45. Fibrin to von Willebrand factor ratio in arterial thrombi is associated with plasma levels of inflammatory biomarkers and local abundance of extracellular DNA
- Author
-
Péter Sótonyi, László Hidi, László Beinrohr, István Szikora, Natalia Nikolova, László Szabó, István Gubucz, Krasimir Kolev, Béla Merkely, Kiril Tenekedjiev, Anikó Ilona Nagy, and Erzsébet Tóth
- Subjects
Male ,Pathology ,medicine.medical_specialty ,Inflammation ,Fibrin ,Brain Ischemia ,Coronary artery disease ,Von Willebrand factor ,hemic and lymphatic diseases ,von Willebrand Factor ,medicine ,Humans ,Platelet ,cardiovascular diseases ,Thrombus ,biology ,business.industry ,Thrombosis ,Hematology ,Neutrophil extracellular traps ,DNA ,medicine.disease ,Stroke ,cardiovascular system ,biology.protein ,medicine.symptom ,business ,Biomarkers ,circulatory and respiratory physiology - Abstract
Introduction The composition of thrombi determines their structure, mechanical stability, susceptibility to lysis, and consequently, the clinical outcome in coronary artery disease (CAD), acute ischemic stroke (AIS), and peripheral artery disease (PAD). Fibrin forms the primary matrix of thrombi intertwined with DNA, derived from neutrophil extracellular traps (NETs), and von Willebrand factor (VWF) bridging DNA and platelets. Here we examined the relative content of fibrin, DNA and VWF in thrombi and analyzed their interrelations and quantitative associations with systemic biomarkers of inflammation and clinical characteristics of the patients. Patients, methods Thrombi extracted from AIS (n = 17), CAD (n = 18) or PAD (n = 19) patients were processed for scanning electron microscopy, (immune)stained for fibrin, VWF and extracellular DNA. Fibrin fiber diameter, cellular components, fibrin/DNA and fibrin/VWF ratios were measured. Results Patients' age presented as a strong explanatory factor for a linear decline trend of the VWF content relative to fibrin in thrombi from CAD (adjusted-R2 = 0.43) and male AIS (adjusted-R2 = 0.66) patients. In a subgroup of CAD and PAD patients with dyslipidemia and high (above 80%) prevalence of atherothrombosis a significant correlation was observed between the VWF and DNA content in thrombi (adjusted-R2 = 0.40), whereas a 3.7-fold lower linear regression coefficient was seen in AIS patients, in whom the fraction of thrombi of atherosclerotic origin was 57%. Independently of anatomical location, in patients with atherosclerosis the VWF in thrombi correlated with the plasma C-reactive protein levels. Conclusions The observed interrelations between thrombus constituents and systemic inflammatory biomarkers suggest an intricate interplay along the VWF/NET/fibrin axis in arterial thrombosis.
- Published
- 2021
46. Postdissectiós aortaaneurysma endovascularis kezelése 'candy-plug' technikával perzisztáló állumen esetén
- Author
-
Péter Sótonyi, Csaba Csobay-Novák, Viktória Juhász, Zoltán Szeberin, László Hidi, and Ferenc Imre Suhai
- Subjects
Aortic dissection ,medicine.medical_specialty ,Aorta ,business.industry ,medicine.medical_treatment ,Bentall procedure ,Stent ,General Medicine ,Dissection (medical) ,medicine.disease ,Thrombosis ,Surgery ,Aortic aneurysm ,Aneurysm ,medicine.artery ,medicine ,business - Abstract
Absztrakt: Teljes aortára kiterjedő, A-típusú dissectio miatt Bentall-műtéten, mellkasi aortoaorticus interpositum implantáción és mellkasi sztentgraftbeültetésen átesett 79 éves férfi betegnél perzisztáló állumen miatt kialakult, krónikus, 60 mm-es, thoracoabdominalis postdissectiós aortaaneurysma megoldásaként, hazánkban először, az ún. „candy-plug” technikát alkalmaztuk. Az aortadissectio proximalis berepedésének lefedésével az endovascularis mellkasi aortarekonstrukció (TEVAR) elősegíti az állumen thrombosisát és az aorta remodellálódását, a thrombosis azonban gyakran – az esetek kb. 60%-ában – csak részleges, és az állumen keringése a TEVAR mellett is fennmaradhat. Ezekben az esetekben az aorta további jelentős tágulásával kell számolnunk, amely gyakran csak nagy kockázatú nyitott műtéti vagy endovascularis beavatkozásokkal kezelhető. Ezeknek az eseteknek a biztonságosabb megoldása érdekében fejlesztették ki a standard TEVAR és az állumen zárását szolgáló módszerek kombinációját. Ilyen új eljárás az esetünkben is alkalmazott „candy-plug” technika, amely minimálinvazív úton megszüntetve az állumen keringését és megállítva ezzel az aneurysma progresszióját, hatékony és biztonságos megoldást jelenthet az aortadissectiók késői szövődményeként megjelenő postdissectiós aortaaneurysmák ellátásában. Orv Hetil. 2020; 161(11): 437–439.
- Published
- 2020
- Full Text
- View/download PDF
47. Screening of peripheral arterial disease in primary health care
- Author
-
Gergely Tóth-Vajna, Brigitta Szilágyi, Márton Berczeli, Péter Sótonyi, Zsuzsanna Gombos, Zsombor Tóth-Vajna, and Zoltán Járai
- Subjects
medicine.medical_specialty ,Arterial disease ,Endocrinology, Diabetes and Metabolism ,medicine.medical_treatment ,Population ,030204 cardiovascular system & hematology ,03 medical and health sciences ,0302 clinical medicine ,Internal medicine ,Diabetes mellitus ,medicine ,Pharmacology (medical) ,030212 general & internal medicine ,Medical diagnosis ,Risk factor ,education ,education.field_of_study ,business.industry ,Public Health, Environmental and Occupational Health ,Hematology ,General Medicine ,medicine.disease ,Peripheral ,body regions ,medicine.anatomical_structure ,Amputation ,Cardiology and Cardiovascular Medicine ,business ,Artery - Abstract
Background and purpose The screening tool for diagnosing lower extremity arterial disease is the assessment of the ankle-brachial index (ABI), which is widely used in general practice. However, resting ABI can easily produce a false negative result. In light of this, our goal was to determine the proportion of definitive diagnoses (peripheral arterial disease [PAD] confirmed or refuted) among patients screened in general practice, and the rate of cases in which the need for further specialized examination is necessary, with special attention to groups having non-compressible arteries and ABI negative symptomatic status. The aim of our work is to improve the efficiency of primary health care screening in PAD and reduce the extremely high domestic amputation ratio. Patients and methods Eight hundred and sixteen patients were screened. We used the Edinburgh Questionnaire and recorded medical histories, major risk factors, current complaints, and medication. Physical examinations were performed, including ABI testing. Results Thirty-three percent complained about lower extremity claudication; 23% had abnormal ABI values; 13% of the patients within the normal ABI range had complaints of dysbasia; and 12% were in the non-compressible artery group. The ABI-negative symptomatic group's risk factor profile showed a close similarity to the clear PAD-positive and non-compressible artery groups. Conclusion The percentage of PAD could be higher than the number of patients diagnosed by ABI screening. Nearly a quarter of the population fell into the non-compressible artery and ABI-negative symptomatic groups, together defined as the "murky zone". When screening purposely for PAD, these patients deserve special attention due to the insufficient selectivity and sensitivity of measurements. If there is high clinical suspicion of PAD in spite of normal ABI values, further assessment may be considered.
- Published
- 2019
- Full Text
- View/download PDF
48. HeRO (Hemodialysis Reliable Outflow) graft alkalmazása tartós hemodialíziskezelés során
- Author
-
Péter Legeza, Dávid Garbaisz, Zoltán Szeberin, and Péter Sótonyi
- Subjects
medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,Fistula ,Arteriovenous fistula ,General Medicine ,medicine.disease ,Surgery ,03 medical and health sciences ,0302 clinical medicine ,medicine.anatomical_structure ,Occlusion ,medicine ,Upper limb ,HERO ,030211 gastroenterology & hepatology ,Hemodialysis ,business ,Subclavian vein ,Central venous catheter - Abstract
Abstract: Creating durable vascular access has become more complicated with the improvement of the management and with the increasing survival of patients with end-stage renal disease. HeRO (Hemodialysis Reliable Outflow) graft allows to maintain vascular access on the upper limb in patients with the presence of bilateral central venous occlusion. Our institute was the first in Hungary to perform a HeRO graft implantation in a patient receiving regular hemodialysis. Our objective was to present our findings with this recent innovation. Case report, medical documentation and imaging studies were reviewed. The patient (73-year-old, female) has been receiving hemodialysis since 12 years with the history of several arteriovenous fistula (AVF) creations, thrombectomies, use of central venous catheter in both sides. Following the occlusion of a left cubital arterio-venous fistula, none of the conventional vascular access types could have been performed due to bilateral subclavian vein occlusion. Successful HeRO graft implantation was performed. The patient underwent graft thrombectomy and endovascular intervention 7 and 12 months after the original procedure. After both reoperations, the graft functioned well for hemodialysis. HeRO graft can be a good alternative to central venous catheters and lower limb arterio-venous grafts in cases of bilateral central venous occlusion. Orv Hetil. 2019; 160(31): 1231–1234.
- Published
- 2019
- Full Text
- View/download PDF
49. Digital Variance Angiography as a Paradigm Shift in Carbon Dioxide Angiography
- Author
-
Viktor Óriás, Marcell Gyánó, Péter Sótonyi, Ruzsa Zoltán, Oláh Zoltán, István Góg, Z. Nagy, Krisztián Szigeti, Dávid Szöllősi, Szabolcs Osváth, Csaba Csobay-Novák, Dániel S. Veres, and János Kiss
- Subjects
Male ,Computer science ,Image quality ,Contrast Media ,Image processing ,Signal-To-Noise Ratio ,030218 nuclear medicine & medical imaging ,03 medical and health sciences ,0302 clinical medicine ,Image Processing, Computer-Assisted ,medicine ,Humans ,Image acquisition ,Radiology, Nuclear Medicine and imaging ,Computer vision ,Prospective Studies ,Aged ,medicine.diagnostic_test ,business.industry ,Angiography ,Angiography, Digital Subtraction ,General Medicine ,Variance (accounting) ,Carbon Dioxide ,Paradigm shift ,Female ,Artificial intelligence ,business ,030217 neurology & neurosurgery - Abstract
Our aim was to investigate the feasibility of digital variance angiography (DVA) in lower extremity CO2 angiography and to compare the quantitative and qualitative performance of the new image processing technique with that of the current reference standard digital subtraction angiography (DSA).This prospective study enrolled 24 patients (mean age ± SD, 65.5 ± 9.2 years; 14 males, 65.1 ± 7.5 years; 10 females, 66.1 ± 11.6 years) undergoing lower-limb CO2 angiography between December 2017 and April 2018 at 2 clinical centers: The Heart and Vascular Center (HVC) of Semmelweis University, Budapest (7 patients), and the Bács-Kiskun County Hospital (BKCH) in Kecskemét (17 patients). The interventional protocol was similar at both sites, but the image acquisition instruments and protocols were different, which allowed us to investigate DVA in different settings. For comparison, the signal-to-noise ratio (SNR) of DSA and DVA images were calculated. The visual quality of DSA and DVA images were compared by independent clinical specialists using an online questionnaire. Interrater agreement was characterized by percent agreement and Fleiss kappa. The specialists also evaluated in a random and blinded manner the individual DSA and DVA images on a 5-grade scale ranging from poor (1) to outstanding (5) image quality, and the mean ± standard error of mean (SEM) was calculated.A total of 4912 regions of interest were carefully selected in 110 image pairs to determine the SNRs. The ratio of SNRDVA/SNRDSA was calculated. At HVC, it ranged between 2.58 and 4.16 in the anatomical regions (abdominal, iliac, femoral, popliteal, crural, talar), and the overall median value was 3.53, whereas at BKCH the range was 2.71 to 4.92 and the overall median value was 4.52. During the visual evaluation, 120 DSA and DVA image pairs were compared. At HVC in 78%, although at BKCH in 90% of comparisons, it was judged that DVA provided higher quality images. The interrater agreement was 88% (P0.001) and 90% (P0.01), respectively. DVA images received consistently higher individual rating than DSA images, regardless of the research site and anatomical region. At HVC, the overall DSA and DVA scores (mean ± SEM) were 2.75 ± 0.12 and 3.23 ± 0.16, respectively (P0.05), whereas at BKCH these values were 2.49 ± 0.10 and 3.03 ± 0.09, respectively (P0.001).These data show that lower-limb CO2 angiography DVA, regardless of the image acquisition instruments and protocols, produces higher SNR and significantly better image quality than DSA; therefore this new image processing technique might help the widespread use of CO2 as a safer contrast agent in clinical practice.
- Published
- 2019
- Full Text
- View/download PDF
50. Kinetic Imaging in Lower Extremity Arteriography: Comparison to Digital Subtraction Angiography
- Author
-
István Góg, Szabolcs Osváth, Péter Sótonyi, Z. Nagy, Béla Merkely, Balázs Nemes, Viktor Óriás, Marcell Gyánó, Zoltán Oláh, Krisztián Szigeti, Zoltán Ruzsa, and Csaba Csobay-Novák
- Subjects
Male ,Image Series ,Signal-To-Noise Ratio ,030218 nuclear medicine & medical imaging ,Peripheral Arterial Disease ,03 medical and health sciences ,0302 clinical medicine ,Image Interpretation, Computer-Assisted ,Humans ,Medicine ,Radiology, Nuclear Medicine and imaging ,Prospective Studies ,Aged ,Aged, 80 and over ,medicine.diagnostic_test ,business.industry ,Angiography ,Angiography, Digital Subtraction ,food and beverages ,Digital subtraction angiography ,Middle Aged ,Kinetics ,Lower Extremity ,030220 oncology & carcinogenesis ,Female ,business ,Nuclear medicine - Abstract
Purpose To compare the image quality produced by kinetic imaging in x-ray angiography and the current reference standard digital subtraction angiography (DSA). Materials and Methods This prospective observational crossover study enrolled 42 patients undergoing lower limb x-ray angiography between February and June 2017 (mean age, 68.7 years; age range, 49-89 years; 32 men [mean age, 67.1 years; age range, 49-89 years] and 10 women [mean age, 75 years; age range, 57-85 years]). Signal-to-noise ratios (SNRs) of DSA and kinetic image pairs were compared. Visual quality comparisons were also performed by specialists who used an online questionnaire. Interrater agreement was characterized by percent agreement and Fleiss k. Results A total of 1902 regions of interest were carefully selected in 110 image pairs to calculate and compare the SNRs. Median SNR in raw kinetic images was 3.3-fold and 2.3-fold higher than raw and postprocessed DSA images, respectively. A total of 232 pairs of raw and postprocessed kinetic images were compared. It was indicated that postprocessing improved the quality of kinetic images in 63.9% (2668 of 4176) of the comparisons. Interrater agreement was 75% and Fleiss k was 0.12 (P.001). Also, 238 pairs of kinetic and DSA images were compared. Kinetic imaging was judged to have provided higher quality images than DSA in 69.0% (2462 of 3570) of the comparisons. The interrater agreement was 81% and Fleiss k was 0.17 (P.001). Conclusion Kinetic imaging helps to view the same structures as digital subtraction angiography but offers better image quality. The improved signal-to-noise ratio suggests that this approach could reduce radiation exposure and improve the ability to view smaller vessels. © RSNA, 2018 Online supplemental material is available for this article.
- Published
- 2019
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.