1,402 results on '"Vardas P"'
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2. Biographical notes
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Vardas Pavardė
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Biographical notes ,Social sciences (General) ,H1-99 ,Philology. Linguistics ,P1-1091 ,Philosophy. Psychology. Religion - Published
- 2021
3. Anticoagulation in Patients With Device‐Detected Atrial Fibrillation With and Without a Prior Stroke or Transient Ischemic Attack: The NOAH‐AFNET 6 Trial
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Hans Christoph Diener, Nina Becher, Susanne Sehner, Tobias Toennis, Emanuele Bertaglia, Carina Blomstrom‐Lundqvist, Axel Brandes, Vincent Beuger, Melanie Calvert, A. John Camm, Gregory Chlouverakis, Gheorghe‐Andrei Dan, Wolfgang Dichtl, Alexander Fierenz, Andreas Goette, Joris R. de Groot, Astrid Hermans, Gregory Y. H. Lip, Andrzej Lubinski, Eloi Marijon, Béla Merkely, Lluís Mont, Julius Nikorowitsch, Ann‐Kathrin Ozga, Kim Rajappan, Andrea Sarkozy, Daniel Scherr, Renate B. Schnabel, Ulrich Schotten, Emmanuel Simantirakis, Panos Vardas, Dan Wichterle, Antonia Zapf, and Paulus Kirchhof
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anticoagulation ,atrial fibrillation ,CHA2DS2‐VASc score ,device‐detected atrial fibrillation ,NOAH‐AFNET 6 ,recurrent stroke ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Background Short and rare episodes of atrial fibrillation (AF) are commonly detected using implanted devices (device‐detected AF) in patients with prior stroke or transient ischemic attack (TIA). The effectiveness and safety of oral anticoagulation in patients with prior stroke or TIA and device‐detected AF but with no ECG‐documented AF is unclear. Methods and Results This prespecified analysis of the NOAH‐AFNET 6 (Non‐Vitamin K Antagonist Oral Anticoagulants in Patients With Atrial High Rate Episodes) trial with post hoc elements assessed the effect of oral anticoagulation in patients with device‐detected AF with and without a prior stroke or TIA in the randomized, double‐blind, double‐dummy NOAH‐AFNET 6 trial. Outcomes were stroke, systemic embolism, and cardiovascular death (primary outcome) and major bleeding and death (safety outcome). A prior stroke or TIA was found in 253 patients with device‐detected AF randomized in the NOAH‐AFNET 6 (mean age, 78 years; 36.4% women). There was no treatment interaction with prior stroke or TIA for any of the primary and secondary time‐to‐event outcomes. In patients with a prior stroke or TIA, 14 out of 122 patients experienced a primary outcome event with anticoagulation (5.7% per patient‐year). Without anticoagulation, there were 16 out of 131 patients with an event (6.3% per patient‐year). The rate of stroke was lower than expected (anticoagulation: 4 out of 122 [1.6% per patient‐year]; no anticoagulation: 6 out of 131 [2.3% per patient‐year]). Numerically, there were more major bleeding events with anticoagulation in patients with prior stroke or TIA (8 out of 122 patients) than without anticoagulation (2 out of 131 patients). Conclusions Anticoagulation appears to have ambiguous effects in patients with device‐detected AF and a prior stroke or TIA in this hypothesis‐generating analysis of the NOAH‐AFNET 6 in the absence of ECG‐documented AF, partially due to a low rate of stroke without anticoagulation.
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- 2024
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4. Global epidemiology of acute coronary syndromes
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Timmis, Adam, Kazakiewicz, Denis, Townsend, Nick, Huculeci, Radu, Aboyans, Victor, and Vardas, Panos
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- 2023
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5. Effect of elevated HbA1c on outcomes in on-pump versus off-pump coronary artery bypass grafting
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Cooke, Brett, Williams, Lamario, Delay, T. Kurt, Xie, Rongbing, Cornelius, Katherine, Davies, James E., and Vardas, Panos N.
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- 2023
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6. Effect of elevated HbA1c on outcomes in on-pump versus off-pump coronary artery bypass grafting
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Brett Cooke, Lamario Williams, T. Kurt Delay, Rongbing Xie, Katherine Cornelius, James E. Davies, and Panos N. Vardas
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Coronary artery bypass grafting ,Hemoglobin A1c ,Surgery ,RD1-811 ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Abstract Background Diabetic patients are at an increased risk of cardiovascular morbidities. We aimed to examine if elevated pre-operative glycosylated hemoglobin (HbA1c) levels are associated with higher likelihood of experiencing adverse events in on-pump (ONCAB) versus off-pump (OPCAB) coronary artery bypass graft (CABG) procedures. We examined characteristics of patients undergoing CABG using our institutional STS Adult Cardiac Surgery Database (ACSD) from 2014 to 2020. Descriptive statistics and univariate analyses were used to compare postoperative outcomes between ONCAB and OPCAB based on preoperative HbA1c levels: (1) HbA1c ≤ 6.0%, (2) 6.0% < HbA1c ≤ 7.0%, (3) 7.0% < HbA1c ≤ 8.5%, (4) HbA1c > 8.5%. Multivariable models were built to assess risk factors associated with adverse events. Primary outcomes were operative mortality and stroke. Results For ONCAB, statistically significant associations were found between increasing HbA1c and new post-operative dialysis (p=0.01), rates of readmission (p=0.003) and greater lengths of stay (p=0.002). For OPCAB, statistically significant associations were found between increasing HbA1c and rates of operative mortality (p=0.04), post-operative renal failure (p=0.0001), new post-operative dialysis (p=0.0001), sternal wound infection (p=0.01), and greater lengths of stay (p=0.03). No significant relationship was noted between HbA1c and stroke, reoperation due to bleeding, or post-operative transfusion. Conclusions Increasing HbA1c positively correlated with numerous adverse patient outcomes in both ONCAB and OPCAB, and differences were noted in which outcomes were most impacted between the two techniques. Pre-operative medical optimization from a diabetes standpoint is paramount to improve CABG outcomes in both on-pump or off-pump techniques.
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- 2023
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7. Heart failure with mildly reduced ejection fraction: from diagnosis to treatment. Gaps and dilemmas in current clinical practice
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Cvijic, Marta, Rib, Yelena, Danojevic, Suzana, Radulescu, Crina Ioana, Nazghaidze, Natia, and Vardas, Panos
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- 2023
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8. MicroRNAs in Atrial Fibrillation: Mechanisms, Vascular Implications, and Therapeutic Potential
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Emmanouil P. Vardas, Panagiotis Theofilis, Evangelos Oikonomou, Panos E. Vardas, and Dimitris Tousoulis
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atrial fibrillation ,fibrosis ,inflammation ,oxidative stress ,microRNA ,Biology (General) ,QH301-705.5 - Abstract
Atrial fibrillation (AFib), the most prevalent arrhythmia in clinical practice, presents a growing global health concern, particularly with the aging population, as it is associated with devastating complications and an impaired quality of life. Its pathophysiology is multifactorial, including the pathways of fibrosis, inflammation, and oxidative stress. MicroRNAs (miRNAs), small non-coding RNA molecules, have emerged as substantial contributors in AFib pathophysiology, by affecting those pathways. In this review, we explore the intricate relationship between miRNAs and the aforementioned aspects of AFib, shedding light on the molecular pathways as well as the potential diagnostic applications. Recent evidence also suggests a possible role of miRNA therapeutics in maintenance of sinus rhythm via the antagonism of miR-1 and miR-328, or the pharmacological upregulation of miR-27b and miR-223-3p. Unraveling the crosstalk between specific miRNA profiles and genetic predispositions may pave the way for personalized therapeutic approaches, setting the tone for precision medicine in atrial fibrillation.
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- 2024
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9. Improving the Performance and Resilience of MPI Parallel Jobs with Topology and Fault-Aware Process Placement
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Vardas, Ioannis, Ploumidis, Manolis, and Marazakis, Manolis
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Computer Science - Distributed, Parallel, and Cluster Computing ,C.4 - Abstract
HPC systems keep growing in size to meet the ever-increasing demand for performance and computational resources. Apart from increased performance, large scale systems face two challenges that hinder further growth: energy efficiency and resiliency. At the same time, applications seeking increased performance rely on advanced parallelism for exploiting system resources, which leads to increased pressure on system interconnects. At large system scales, increased communication locality can be beneficial both in terms of application performance and energy consumption. Towards this direction, several studies focus on deriving a mapping of an application's processes to system nodes in a way that communication cost is reduced. A common approach is to express both the application's communication patterns and the system architecture as graphs and then solve the corresponding mapping problem. Apart from communication cost, the completion time of a job can also be affected by node failures. Node failures may result in job abortions, requiring job restarts. In this paper, we address the problem of assigning processes to system resources with the goal of reducing communication cost while also taking into account node failures. The proposed approach is integrated into the Slurm resource manager. Evaluation results show that, in scenarios where few nodes have a low outage probability, the proposed process placement approach achieves a notable decrease in the completion time of batches of MPI jobs. Compared to the default process placement approach in Slurm, the reduction is 18.9% and 31%, respectively for two different MPI applications., Comment: 21 pages, 8 figures, added Acknowledgements section
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- 2020
10. Autoimmune rheumatic diseases associated with granulomatous mastitis
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Parperis, Konstantinos, Achilleos, Savvas, Costi, Egli, and Vardas, Michail
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- 2023
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11. Ablation of residual potentials along the circumferential line reduces acute pulmonary vein reconnection
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Stylianos Tzeis, MD, PhD, Sandro Brusich, MD, PhD, Šime Manola, MD, PhD, Dejan Kojić, MD, Andrej Pernat, MD, PhD, Dimitrios Asvestas, MD, Theodoros Xenos, Ana Lanča Bastiančić, MD, Milosav Tomović, MD, Martin Rauber, MD, PhD, Panos Vardas, MD, PhD, and Nikola Pavlović, MD, PhD
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atrial fibrillation ,pulmonary vein isolation ,residual potentials ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Introduction: Acute pulmonary vein (PV) reconnection is frequently encountered in patients undergoing PV isolation (PVI) procedure for the treatment of atrial fibrillation. In this study, we investigated whether the identification and ablation of residual potentials (RPs), after the initial achievement of PVI, reduces acute PV reconnection rate. Methods: Following PVI in 160 patients, mapping along the ablation line was performed to identify RPs, defined as bipolar amplitude ≥0.2 mV or 0.1-0.19 mV combined with a negative component of the unipolar electrogram. Ipsilateral PV sets with RPs were randomized to either no further ablation (Group B) or to additional ablation of the identified RPs (Group C). The primary study endpoint was spontaneous or adenosine-mediated acute PV reconnection after a 30-min waiting period and was also evaluated in ipsilateral PV sets without RPs (Group A). Results: After isolation of 287 PV pairs, 135 had no RPs (Group A), whereas the remaining PV pairs were randomized to either Group B (n = 75) or Group C (n = 77). Ablation of RPs resulted in a reduction of spontaneous or adenosine-mediated PV reconnection rate (16.9% in Group C vs 48.0% in Group B; p
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- 2023
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12. The Online Min-Sum Set Cover Problem
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Fotakis, Dimitris, Kavouras, Loukas, Koumoutsos, Grigorios, Skoulakis, Stratis, and Vardas, Manolis
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Computer Science - Data Structures and Algorithms - Abstract
We consider the online Min-Sum Set Cover (MSSC), a natural and intriguing generalization of the classical list update problem. In Online MSSC, the algorithm maintains a permutation on $n$ elements based on subsets $S_1, S_2, \ldots$ arriving online. The algorithm serves each set $S_t$ upon arrival, using its current permutation $\pi_{t}$, incurring an access cost equal to the position of the first element of $S_t$ in $\pi_{t}$. Then, the algorithm may update its permutation to $\pi_{t+1}$, incurring a moving cost equal to the Kendall tau distance of $\pi_{t}$ to $\pi_{t+1}$. The objective is to minimize the total access and moving cost for serving the entire sequence. We consider the $r$-uniform version, where each $S_t$ has cardinality $r$. List update is the special case where $r = 1$. We obtain tight bounds on the competitive ratio of deterministic online algorithms for MSSC against a static adversary, that serves the entire sequence by a single permutation. First, we show a lower bound of $(r+1)(1-\frac{r}{n+1})$ on the competitive ratio. Then, we consider several natural generalizations of successful list update algorithms and show that they fail to achieve any interesting competitive guarantee. On the positive side, we obtain a $O(r)$-competitive deterministic algorithm using ideas from online learning and the multiplicative weight updates (MWU) algorithm. Furthermore, we consider efficient algorithms. We propose a memoryless online algorithm, called Move-All-Equally, which is inspired by the Double Coverage algorithm for the $k$-server problem. We show that its competitive ratio is $\Omega(r^2)$ and $2^{O(\sqrt{\log n \cdot \log r})}$, and conjecture that it is $f(r)$-competitive. We also compare Move-All-Equally against the dynamic optimal solution and obtain (almost) tight bounds by showing that it is $\Omega(r \sqrt{n})$ and $O(r^{3/2} \sqrt{n})$-competitive., Comment: A preliminary version of this article appeared in the Proceedings of the 47th International Colloquium on Automata, Languages and Programming (ICALP 2020)
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- 2020
13. Asymptomatic papillary fibroelastoma of the Aortic valve in a young woman - a case report
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Pitsis Antonis, Patrianakos Alexandros, Nyktari Evangelia, Parthenakis Fragiskos, Asimaki Anthoula, and Vardas Panos
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Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Abstract Echocardiography represents an invaluable diagnostic tool for the detection of intracardiac masses while simultaneously provides information about their size, location, mobility and attachment site as well as the presence and extent of any consequent hemodynamic derangement. A 29-year-old asymptomatic young woman with incidental transthoracic echocardiographic (TTE) discovery of an aortic valve mass is presented. The 2-dimensional TTE showed a mobile, pedunculated mass, attached by a thin stalk to the aortic surface of the right coronary aortic cusp at the junction of its base with the anterior aortic wall. The importance of valve sparing tumour resection even in asymptomatic patients is emphasised.
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- 2009
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14. Are measurements of systolic myocardial velocities and displacement with colour and spectral Tissue Doppler compatible?
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Winter Reidar, Shahgaldi Kambiz, Nyktari Evangelia, Shala Arben, Manouras Aristomenis, Vardas Panagiotis, Brodin Lars-Åke, and Nowak Jacek
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Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Abstract Background Tissue Doppler (TD) in pulsed mode (spectral TD) and colour TD are the two modalities today available in tissue velocity echocardiography (TVE). Previous studies have shown poor agreement between these two methods when measuring myocardial velocities and displacement. In this study, the concordance between the myocardial velocity and displacement measurements using colour TD and different spectral TD procedures was evaluated. Methods Left ventricular (LV) longitudinal systolic myocardial velocities and displacement during ejection period were quantified at the basal septal and lateral wall in 24 healthy individuals (4 women and 20 men, 34 ± 12 years) using spectral TD, colour TD and M-mode recordings. Mean, maximal and minimal spectral TD systolic velocities and the corresponding displacement values were obtained by measurements at the outer and inner borders of the spectral velocity signal. The results were then compared with those obtained with the two other modalities used. Results Systolic myocardial velocities derived from mean spectral TD frequencies were highly concordant with corresponding colour TD measurements (mean difference 0.10 ± 0.54 cm/sec in septal and 0.09 ± 0.97 cm/sec in lateral wall). Similarly, the agreement between spectral and colour TD (mean difference 0.22 ± 0.74 mm in septal and 0.02 ± 0.86 mm in lateral wall) as well as M-mode was good when mean spectral velocities were temporally integrated and the results did not differ statistically. Conversely, displacement values from the inner or outer border of the spectral signal differed significantly from values obtained with colour TD and M-mode (p < 0.001, in both cases). Conclusion LV systolic myocardial measurements based on mean spectral TD frequencies are highly concordant with those provided by colour TD and M-mode. Hence, in order to maintain compatibility of the results, the use of this particular spectral TD procedure should be advocated in clinical praxis.
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- 2009
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15. Risk factors for ischaemic heart disease in a Cretan rural population: a twelve year follow-up study
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Koutis Antonios D, Kafatos Antonios G, Alegakis Athanasios K, Karalis Ioannis K, Vardas Panos E, and Lionis Christos D
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Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background Crete has been of great epidemiological interest ever since the publication of the Seven Countries Study. In 1988 a well-defined area of rural Crete was studied, with only scarce signs of coronary heart disease (CHD) despite the unfavorable risk profile. The same population was re-examined twelve years later aiming to describe the trends of CHD risk factors over time and discuss some key points on the natural course of coronary heart disease in a rural population of Crete. Methods and Results We re-examined 200 subjects (80.7% of those still living in the area, 62.4 ± 17.0 years old). The prevalence of risk factors for CHD was high with 65.9% of men and 65.1% of women being hypertensive, 14.3% of men and 16.5% of women being diabetic, 44% of men being active smokers and more than 40% of both sexes having hyperlipidaemia. Accordingly, 77.5% of the population had a calculated Framingham Risk Score (FRS) ≥ 15%, significantly higher compared to baseline (p < 0.001). The overall occurrence rate for CHD events was calculated at 7.1 per 1000 person-years (95% confidence interval: 6.8–7.3). Conclusion The study confirms the unfavorable risk factor profile of a well defined rural population in Crete. Its actual effect on the observed incidence of coronary events in Cretans remains yet to be defined.
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- 2007
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16. Allergic rhinitis: Review of the diagnosis and management: South African Allergic Rhinitis Working Group
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Guy A. Richards, Marinda McDonald, Claudia L. Gray, Pieter de Waal, Ray Friedman, Maurice Hockman, Sarah J. Karabus, Cornelia M. Lodder, Tshegofatso Mabelane, Sylvia M. Mosito, Ashen Nanan, Jonny G. Peter, Traugott H.C. Quitter, Riaz Seedat, Sylvia van den Berg, Andre van Niekerk, Eftyhia Vardas, and Charles Feldman
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allergic rhinitis ,intranasal corticosteroids ,antihistamines ,immunotherapy ,saline rinse ,Medicine - Abstract
Background: Allergic rhinitis (AR) has a significant impact on the community as a whole with regard to quality of life and its relationship to allergic multi-morbidities. Appropriate diagnosis, treatment and review of the efficacy of interventions can ameliorate these effects. Yet, the importance of AR is often overlooked, and appropriate therapy is neglected. The availability of effective medications and knowledge as to management are often lacking in both public and private health systems. Methods: This review is based on a comprehensive literature search and detailed discussions by the South African Allergic Rhinitis Working Group (SAARWG). Results: The working group provided up-to-date recommendations on the epidemiology, pathology, diagnosis and management of AR, appropriate to the South African setting. Conclusion: Allergic rhinitis causes significant, often unappreciated, morbidity. It is a complex disease related to an inflammatory response to environmental allergens. Therapy involves education, evaluation of allergen sensitisation, pharmacological treatment, allergen immunotherapy (AIT) and evaluation of the success of interventions. Regular use of saline; the important role of intranasal corticosteroids, including those combined with topical antihistamines and reduction in the use of systemic steroids are key. Practitioners should have a thorough knowledge of associated morbidities and the need for specialist referral. Contribution: This review summarises the latest developments in the diagnosis and management of AR such that it is a resource that allows easy access for family practitioners and specialists alike.
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- 2023
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17. The role of intravascular imaging in chronic total occlusion percutaneous coronary intervention
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Iosif Xenogiannis, Antonis N. Pavlidis, Thomas E. Kaier, Angelos G. Rigopoulos, Grigoris V. Karamasis, Andreas S. Triantafyllis, Panos Vardas, Emmanouil S. Brilakis, and Andreas S. Kalogeropoulos
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chronic total occlusion (CTO) ,intravascular imaging ,intravascular ultrasound (IVUS) ,optical coherence tomography (OCT) ,CTO crossing ,stent optimization ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Chronic total occlusions (CTOs) represent the most complex subset of coronary artery disease and therefore careful planning of CTO percutaneous coronary recanalization (PCI) strategy is of paramount importance aiming to achieve procedural success, and improve patient's safety and post CTO PCI outcomes. Intravascular imaging has an essential role in facilitating CTO PCΙ. First, intravascular ultrasound (IVUS), due to its higher penetration depth compared to optical coherence tomography (OCT), and the additional capacity of real-time imaging without need for contrast injection is considered the preferred imaging modality for CTO PCI. Secondly, IVUS can be used to resolve proximal cap ambiguity, facilitate wire re-entry when dissection and re-entry strategies are applied and most importantly to guide stent deployment and optimization post implantation. The role of OCT during CTO PCI is currently limited to stent sizing and optimization, however, due to its high spatial resolution, OCT is ideal for detecting stent edge dissections and strut malapposition. In this review, we describe the use of intravascular imaging for lesion crossing, plaque characterization and wire tracking, extra- or intra-plaque, and stent sizing and optimization during CTO PCI and summarize the findings of the major studies in this field.
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- 2023
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18. Distal Biliary Stent Migration in Patients with Irretrievable Bile Duct Stones: Long-Term Comparison Between Straight and Double-Pigtail Stents
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Paspatis, Gregorios A., Papastergiou, Vasilios, Mpitouli, Afroditi, Velegraki, Magdalini, Nikolaou, Pinelopi, Fragkaki, Maria, Voudoukis, Evangelos, Theodoropoulou, Angeliki, Chlouverakis, Gregorios, Vardas, Emmanouil, and Paraskeva, Konstantina D.
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- 2022
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19. Preoperative hemodynamics as predictors of right heart failure post-left ventricular assist device
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Erik J. Orozco-Hernandez, T. Kurt DeLay, Charles W. Hoopes, Enrique Gongora, Salpy Pamboukian, Rongbing Xie, James E. Davies, and Panos N. Vardas
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LVAD ,Right heart failure ,Heart failure ,Hemodynamics pulmonary artery pulsatility index ,Surgery ,RD1-811 ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Abstract Background Mechanical circulatory support has garnered significant popularity as both a bridge to transplant as well as a destination therapy for patients with end-stage heart failure. Right heart failure (RHF) is a devastating complication after LVAD placement and is very unpredictable. Assisted circulation of the left ventricle (LV) with an LVAD device could unmask an underlying RHF. However, otherwise healthy right ventricles (RVs) can develop RHF after LVAD placement as well due to poor adaptation to new filling pressures and altered hemodynamics. It has been proposed that preoperative volumetric measurements in the pulmonary and systemic vasculature may serve as indicators for a risk of RHF after LVAD implantation. The aim of this study is to examine a potential relationship of preoperative hemodynamic values such as pulmonary artery pulsatility index (PAPi) and the ratio of central venous pressure to pulmonary wedge pressure (CVP/PWP) as preoperative predictors for RHF post LVAD placement. Methods We retrospectively reviewed patients undergoing initially planned isolated LVAD implantation with or without concomitant procedures in our institution from January 1, 2017 to June 12, 2020. Data were gathered from hemodynamic records, echocardiographic interpretations, and clinical notes. Patients who had RHF after LVAD implantation but without hemodynamic data available within 14 days from the operation were excluded. Univariable analysis was performed. Results Of the 114 patients who received planned isolated LVAD surgery, 70 (61.4%) experienced RHF within the first 7 days postoperatively. PAPi did not correlate significantly with RHF vs non-RHF among LVAD recipients (3.1 ± 2.1 vs. 3.8 ± 3.4 P = 0.21). Pre-op CVP/PWP did not differ significantly between RHF and non-RHF patients (0.4 ± 0.2 vs. 0.5 ± 0.8 P = 0.28). There was a nonsignificant correlation between elevated pre-op PWP and those with RHF vs those without, OR = 1.05 (95% CI: 1.00, 1.10). Pre-op systolic pulmonary artery pressure (SysPAP) was elevated in patients with post-LVAD RHF compared to those without (51.3 ± 12.3 vs. 47.2 ± 13.0, P = 0.09). Conclusion Preoperative hemodynamic variables such as PAPi or CVP/PWP did not show a significant correlation predicting RHF post LVAD implantation. Acute RHF post LVAD implantation remains a complex medical entity. Several studies have devised multivariable risk scores; however, their performance has been limited. Despite the widespread use of preoperative hemodynamics measurements as risk scores, our study suggests these scores are not as accurate as their use would suggest, particularly among especially morbid patient populations. More prospective studies are needed to accurately demonstrate how preoperative hemodynamics could predict and help prevent this catastrophic complication.
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- 2022
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20. Assessment of myocardial salvage in patients with STEMI undergoing thrombolysis: ticagrelor versus clopidogrel
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Stylianos Petousis, Michalis Hamilos, Konstantinos Pagonidis, Panos Vardas, Georgios Lazopoulos, Ioannis Anastasiou, Evangelos Zacharis, George Kochiadakis, and Emmanouil Skalidis
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STEMI ,Thrombolysis ,Clopidogrel ,Ticagrelor ,Myocardial salvage ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Abstract Background In the setting of ST-segment elevation myocardial infarction (STEMI), the faster and stronger antiplatelet action of ticagrelor compared to clopidogrel, as well as its pleiotropic effects, could result in a greater degree of cardioprotection and final infarct size (FIS) limitation. The aim of our study was to comparatively evaluate the effect of ticagrelor and clopidogrel on myocardial salvage index (MSI) in STEMI patients undergoing thrombolysis. Methods Forty-two STEMI patients treated with thrombolysis were randomized to receive clopidogrel (n = 21) or ticagrelor (n = 21), along with aspirin. Myocardial area at risk (AAR) was calculated according to the BARI and the APPROACH jeopardy scores. FIS was quantified by cardiac magnetic resonance imaging (CMR) performed 5–6 months post-randomization. MSI was calculated as (AAR-FIS)/AAR × 100%. Primary endpoint of our study was MSI. Secondary endpoints were FIS and CMR-derived left ventricular ejection fraction (LVEF) at 5 –6 months post-randomization. Results By using the BARI score for AAR calculation, mean MSI was 52.25 ± 30.5 for the clopidogrel group and 54.29 ± 31.08 for the ticagrelor group (p = 0.83), while mean MSI using the APPROACH score was calculated at 51.94 ± 30 and 53.09 ± 32.39 (p = 0.9), respectively. Median CMR-derived FIS—as a percentage of LV—was 10.7% ± 8.25 in the clopidogrel group and 12.09% ± 8.72 in the ticagrelor group (p = 0.6). Mean LVEF at 5–6 months post-randomization did not differ significantly between randomization groups. Conclusions Our results suggest that the administration of ticagrelor in STEMI patients undergoing thrombolysis offer a similar degree of myocardial salvage, compared to clopidogrel.
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- 2022
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21. Program characteristics of cardiothoracic surgery departments versus divisions
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Lisa M. Soler, Raymond A. Lopez, Kyle J. Hornbuckle, Robert J. Dabal, Herbert Chen, Rongbing Xie, and Panos N. Vardas
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Cardiac surgery ,Cardiothoracic surgery ,Program organization ,Surgery ,RD1-811 ,Anesthesiology ,RD78.3-87.3 - Abstract
Abstract Background The organizational structure of cardiothoracic surgery practices varies among different programs throughout the United States (U.S.). We aimed to investigate the characteristics of the top ranked programs within the specialty and the surgeons practicing within each. Methods The top 50 hospitals for adult cardiology and heart surgery were identified using the US News and World Report 2019–20 ranking. There were 590 hospitals reported on, with 50 top rated programs. Data was collected from each hospital’s website, analyses conducted using SAS 9.4 with statistical significance set at p ≤ 0.05. Results When comparing cardiothoracic surgery program organizational structures, 21 of the top 50 ranked programs were departments and 24 were divisions within their respective Department of Surgery. Mean number of surgeons was 11 with no statistical difference when analyzed by division versus department. Overall, 9% of practicing cardiothoracic surgeons were female. Between programs that are a department versus division, general thoracic surgery was included in 58% of divisions and 52% of departments (p = ns). Among programs that were departments, approximately 6% of surgeons had attained a Ph.D., while in divisions approximately 4% of surgeons had attained a Ph.D. Conclusions The top 50 Cardiothoracic Surgery programs in the U.S. have approximately the same number of surgeons within the group and are organized similarly. This study group had a slightly higher percentage of female surgeons than has previously been noted in cardiothoracic surgery, with general thoracic surgery trending toward higher gender diversity. The presence of physician scientists was low, though similar amongst the study groups.
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- 2022
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22. Clinical characteristics and management of patients with diabetes mellitus and stable coronary artery disease in daily clinical practice. The SCAD–DM Registry
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Maria E. Marketou, Charalambos Vlachopoulos, George Hahalis, Kristalenia Kafkala, Nikolaos Kouvelas, Ioannis Mantas, Antonios Sideris, Evaggelos Pisimisis, Emmanouel P. Vardas, Stylianos Tzeis, Panos E. Vardas, Vassiliki Dimitroula, Christos Hatjielefteriou, Nikolaos Kampouridis, Georgios Karakostas, Athanasios Karanasios, Stylianos Lambropoulos, Fotios Papalisandrou, Emmanouil Scoubourdis, Nikolaos Smirnioudis, Eleftherios Adamopoulos, Georgios Aggelopoulos, Charalampos Albanis, Alexandros Amaslidis, Maria Andreopoulou, Ilias Antoniou, Ilias Apostolou, Georgios Afaras, Vasileios Arfaras, Konstantinos Aronis, Georgios Askar, Christos Athanasiou, Sokratis Avlonitis Antonios Beroukas, Emmanouil Chorozopoulos, Nikolaos Chrysomallis, Konstantinos Davos, Eftichia Demerouti, Vasileios Dimopoulos, Nikolaos Dimoulis, Vasileios Drakoulidis, Kiriaki Faka, Dimitrios Fotiadis, Alexandros Galapis, Antonios Giakoumis, Ioannis Goupios, Christos Harbas, Vasileios Hatjiioakeimidis, Georgios Hondrokoukis, Panagiotis Kalaras, Marina Kanakaraki, Konstantinos Kapetanios, Vasileios Karasavvidis, Theodoros Karonis, Andreas Karydakis, Christos Katsaris, Christos Katsikas, Konstantinos Katsas, Sokratis Kazantzidis, Nikolaos Kipouridis, Eirini Kokani, Georgios Kolios, Ilias Konstantinidis, Themistoklis Konstantinou, Marios Konstantinou, Georgios Kontopoulos, Georgios Kontoroupis, Georgios Koroniotis, Apostolos Kotidis, Chrysanthi Koukosi, Mihail Kouremetis, Christos Kouris, Georgios Kouskos, Konstantinos Koutras, Georgios Koutsibanis, Harikleia Krontira, Konstantinos Lalenis, Christos Liatas, Leonidas Lillis, Grigorios Limperatos, Emmanouil Liodakis, Stavros Liropoulos, Ioannis Livaditis, Dimitrios Logothetis, Maria Lolaka, Georgios Loukidelis, Georgios Mablekos, Antonios Manousakis, Nikolaos Marinakis, Dimitrios Markou, Virginia Markou, Anestis Matziridis, Panagiotis Mavraganis, Vasileios Mavridis, Ioannis Mavrodimitrakis, Georgios Migias, Dimitrios Mitropoulos, Christos Mitroulas, Savvas Nikiforos, Vasileios Nikolaidis, Christos Nikopoulos, Nikoloaos Oikonomidis, Konstantinos Panagiotopoulos, Georgios Panagoulias, Anna Panou, Ioannis Pantelakis, Achilleas Papadopoulos, Apostolos Papadopoulos, Georgios Papaioannou, Andreas Papamichail, Soultana Papanastasiou, Panagiotis Papas, Eleftherios Papavasileiou, Vasileios Papavasileiou, Athanasios Patialiakas, Alexandros Patsilinakos, Georgios Pechlivanidis, Spiridon Petrogiannis, Nikolaos Pontikakis, Charalampos Parissis, Fotios Patsourakos, Evangelos Pisimisis, Andreas Pittaras, Sotirios Plastiras, Athanasios Platis, Panagiotis Poulikarakos, Markos Prionidis, Paraskevi Psarogianni, Emmanouil Psathakis, Dimitrios Psirropoulos, Maria Riga, Ali Risgits, Evangelos Rosmarakis, Maria Samartzi, Isidoros Sarris, Konstantinos Sassalos, Dimitrios Savvalas, Georgios Siliogas, David Simeonidis, Loukas Sinos, Andreas Skanavis, Achilleas Skordas, Vassiliki Sklirou, Iason Skotiniotis, Anastasios Spanos, Dimitrios Sratech, Christos Stathopoulos, Rafail Stavropoulos, Christos Stavrotheodoros, Emmanouil Stefanakis, Konstantinos Stefanis, Christos Stefopoulos, Dimitrios Stergiou, Konstantinos Svolis, Konstantinos Toulis, Kallinikos Tsakonas, Nikolaos Tsamis, Eleni Tzamtzi-Mastaka, Georgios Tzeltzes, Ioannis Tsiantis, Theodora Tsiotika, Vasileios Vachliotis, Ioannis Vakalis, Konstantinos Vardakis, Alexandros Vassilopoulos, Georgia Vlahou, Vasileios Vogas, Evropia Voukelatou, Nikiforos Vrettos, Dionisios Xenos, Konstantinos Zagoridis, Tsilla Zafiriou, Christos Zafiris, Maria Zaharia, Fanourios Zampetakis, and Vasileios Zouganelis
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diabetes mellitus ,coronary artery disease ,angina ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Background: Patients with diabetes mellitus (DM) and coronary artery disease (CAD) represent a high-risk population, where comorbidities are common and the progression of coronary heart disease is relatively rapid and extensive. The present survey, conducted nationwide in a Eurozone country, Greece, with a properly organized national health system, aimed to record specific data from a significant number of patients with diabetes and documented stable CAD (SCAD). Methods and results: We conducted our survey across the country, in private and public primary, secondary, and tertiary care centers. A total of 1900 patients aged 71 ± 10 years old who suffered from both DM and chronic coronary syndromes were registered. Of the patients registered, 574 (30.24%) were women. It was found that 506 (26.6%) of the 1900 surveyed patients showed typical angina symptoms, while another 560 (29.5%) patients had developed angina-equivalent symptoms according to their history. Additionally, 324 (17%) patients had atypical symptoms that could not easily be attributed to existing CAD and the remaining 510 (26.8%) of the 1900 patients did not exhibit any angina symptoms during their daily activities. Functional testing for myocardial ischemia was not performed in 833 patients (43.8%). Myocardial scintigraphy was the most commonly used noninvasive technique (644 patients, 34%), while 492 patients (25.9%) had an exercise test and 159 (8.4%) underwent stress echocardiography. Conclusion: Real-world data in this specific high-risk population of diabetic patients with SCAD offer the opportunity to identify and improve diagnostic and therapeutic practice in the healthcare system of a European Union country.
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- 2021
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23. Artificial intelligence-based mining of electronic health record data to accelerate the digital transformation of the national cardiovascular ecosystem: design protocol of the CardioMining study
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Konstantinos Tsioufis, Despoina Ntiloudi, George Giannakoulas, George Lazaros, Constantinos Bakogiannis, George Kassimis, Anastasios Kartas, Panos E Vardas, Dimitrios Farmakis, Periklis Davlouros, Maria Ioannou, George Kochiadakis, Athanasios Samaras, Antonios Ziakas, Theoni Theodoropoulou, Dimitrios V Moysidis, John Skoularigis, Andreas S Papazoglou, Alexandra Bekiaridou, Grigorios Tsoumakas, Panagiotis Bamidis, Grigorios Tsigkas, Nikolaos Fragakis, Vassilios Vassilikos, Ioannis Zarifis, Dimitrios N Tziakas, Athanasios Feidakis, Vasiliki Patsiou, Eirinaios Tsiartas, Antonios Orfanidis, Triantafyllia Grantza, Chrysanthi Ioanna Lampropoulou, Dimitrios Kostakakis, Olga Kazarli, Maria Eirini Kiriakideli, Melina Kyriakou, Dimitra Kontopyrgou, Martha Zergioti, Eleftherios Gemousakakis, Amalia Baroutidou, Alexios Vagianos, Alexandros Liatsos, Konstantinos Barmpagiannos, George Tyrikos, George Konstantinou, Anthi Vasilopoulou, Marina Spaho, Eleni Manthou, Panagiotis Zymaris, Eleni Baliafa, Maria Baloka, Iasonas Dermitzakis, Vasiliki Anagnostopoulou, Chrysi Solovou, Anna Maria Louka, Aliki Iliadou, Ioanna Filimidou, Aspasia Kyriafini, Odysseas Kamzolas, Ioannis Vouloagkas, Despoina Nteli, Nikolaos Outountzidis, Athanasia Vathi, Anastasia Foka, Michael Botis, Anastasia Christodoulou, George Vogiatzis, Eleni Vrana, Maria Nteli, Stefanos Antοniadis, Foteini Charisi, Mairifylli Vamvaka, Dimitrios Triantis, Efi Delilampou, Vaggelis Axarloglou, Georgios Charistos, George Anagnostou, Sofia Christodoulou, Anastasios Papanastasiou, Eleni Tziona, Nikolaos Batis, Katerina Gakidi, Artemis Iosifidou, Andreanna Moura, Christos Alexandropoulos, Theoni Exintaveloni, Asterios Karakoutas, Damianos Porfyropoulos, Michail Bountas, Athanasios Pachoumis, Eleftherios Markidis, Maria Sitmalidou, Athanasia Pappa, Konstantinos C Theodoropoulos, George Rampidis, Apostolos Tzikas, Stylianos Paraskevaidis, Georgios Efthimiadis, Theofilatos Athinagoras, Christoforos Travlos, Nikolaos Vythoulkas-Biotis, Kassiani Maria Nastouli, Nikolaos Kartas, Angeliki Vakka, Maria Bozika, Virginia Anagnostopoulou, Georgios Tsioulos, Emilia Lazarou, Panagiotis Tsioufis, Ioannis Kachrimanidis, Nick Argyriou, Emmanouil Kampanieris, Alexandros Patrianakos, Ioannis Kanakakis, Marios Vasileios Koutroulos, Georgios K Chalikias, Sophia Alexiou, Athena Nasoufidou, Panagiotis Stachteas, Tsantikos Christos, Grigorios Giamouzis, Ioannis Alexanian, Ioannis Styliadis, George Fotos, Nikolaos Bourboulis, Evangelos Pisimisis, Antonis Billis, Ilias Kyparissidis, Dimitrios Tsalikakis, Jens-Michael Papaioannou, and Alexander Löser
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Medicine - Abstract
Introduction Mining of electronic health record (EHRs) data is increasingly being implemented all over the world but mainly focuses on structured data. The capabilities of artificial intelligence (AI) could reverse the underusage of unstructured EHR data and enhance the quality of medical research and clinical care. This study aims to develop an AI-based model to transform unstructured EHR data into an organised, interpretable dataset and form a national dataset of cardiac patients.Methods and analysis CardioMining is a retrospective, multicentre study based on large, longitudinal data obtained from unstructured EHRs of the largest tertiary hospitals in Greece. Demographics, hospital administrative data, medical history, medications, laboratory examinations, imaging reports, therapeutic interventions, in-hospital management and postdischarge instructions will be collected, coupled with structured prognostic data from the National Institute of Health. The target number of included patients is 100 000. Natural language processing techniques will facilitate data mining from the unstructured EHRs. The accuracy of the automated model will be compared with the manual data extraction by study investigators. Machine learning tools will provide data analytics. CardioMining aims to cultivate the digital transformation of the national cardiovascular system and fill the gap in medical recording and big data analysis using validated AI techniques.Ethics and dissemination This study will be conducted in keeping with the International Conference on Harmonisation Good Clinical Practice guidelines, the Declaration of Helsinki, the Data Protection Code of the European Data Protection Authority and the European General Data Protection Regulation. The Research Ethics Committee of the Aristotle University of Thessaloniki and Scientific and Ethics Council of the AHEPA University Hospital have approved this study. Study findings will be disseminated through peer-reviewed medical journals and international conferences. International collaborations with other cardiovascular registries will be attempted.Trial registration number NCT05176769.
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- 2023
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24. Co-existence of Congenital Epidermoid Cyst and Ranula in a Newborn. Report of a Unique Case
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Erofili Papadopoulou, Efstathios Pettas, Lampros Gkoutzanis, Konstantinos Katoumas, Maria Georgaki, Emmanouil Vardas, Evangelia Piperi, and Nikolaos G. Nikitakis
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epidermoid cyst ,mucocele ,newborn ,nonodontogenic cysts ,ranula ,Dentistry ,RK1-715 - Abstract
Background: Congenital cystic swellings involving the floor of the mouth include various lesions such as developmental cysts (e.g., dermoid and epidermoid cysts), ranulas, vascular malformations etc. However, coexistence of such conditions, possibly with a cause-and-effect- relationship, is rare. The purpose of this case report is to present a rare case of a congenital epidermoid cyst associated with a mucous retention cyst in a newborn. Methods: A 6-month-old female infant was referred to an Oral Medicine Clinic in Athens, Greece on October 2019 for evaluation of a swelling at the floor of the mouth, first noticed by her paediatrician just after birth. Clinically, a yellowish “pearly” nodule in close association with the orifice of the left submandibular duct, posteriorly transitioning to a diffuse bluish cystic swelling of the left floor of the mouth was observed. With a provisional diagnosis of a dermoid cyst and/or ranula, a surgical excision was performed under general anaesthesia. Results: Histopathologically, a well-defined, keratin-filled, cystic cavity lined by orthokeratinized stratified squamous epithelium was observed in the anterior aspect while posteriorly and in close proximity, a dilated salivary duct lined by cylindrical, cuboidal or pseudostratified epithelium was noted. A final diagnosis of an epidermoid cyst intimately associated with a mucus retention cyst (ranula) of the submandibular duct was rendered. Conclusions: The coexistence of two cystic lesions in the floor of the mouth with features of epidermoid and mucous retention cyst, respectively, is rare and its pathogenesis intriguing, especially in a newborn.
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- 2023
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25. Program characteristics of cardiothoracic surgery departments versus divisions
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Soler, Lisa M., Lopez, Raymond A., Hornbuckle, Kyle J., Dabal, Robert J., Chen, Herbert, Xie, Rongbing, and Vardas, Panos N.
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- 2022
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26. Preoperative hemodynamics as predictors of right heart failure post-left ventricular assist device
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Orozco-Hernandez, Erik J., Kurt DeLay, Jr, T., Hoopes, Charles W., Gongora, Enrique, Pamboukian, Salpy, Xie, Rongbing, Davies, James E., and Vardas, Panos N.
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- 2022
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27. Modified Cabrol technique for the treatment of adult anomalous left coronary artery from the pulmonary artery
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Davies, James E., Singh, Gagandip, and Vardas, Panos N.
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- 2022
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28. Assessment of myocardial salvage in patients with STEMI undergoing thrombolysis: ticagrelor versus clopidogrel
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Petousis, Stylianos, Hamilos, Michalis, Pagonidis, Konstantinos, Vardas, Panos, Lazopoulos, Georgios, Anastasiou, Ioannis, Zacharis, Evangelos, Kochiadakis, George, and Skalidis, Emmanouil
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- 2022
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29. Epidemiology of cardiovascular disease in Europe
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Townsend, Nick, Kazakiewicz, Denis, Lucy Wright, F., Timmis, Adam, Huculeci, Radu, Torbica, Aleksandra, Gale, Chris P., Achenbach, Stephan, Weidinger, Franz, and Vardas, Panos
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- 2022
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30. Aplasia of the Major and Minor Salivary Glands: Report of a Rare Case
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Erofili Papadopoulou, Evangelia Piperi, Maria Georgaki, Emmanouil Vardas, and Nikolaos G. Nikitakis
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aplasia ,salivary glands ,xerostomia ,Dentistry ,RK1-715 - Abstract
Background: Aplasia of the salivary glands, either partial or involving all the major and possibly the minor salivary glands, is a very rare cause of hyposalivation. The aim of this case report is to present a case of aplasia of the major and minor salivary glands and discuss the relevant literature. Methods: A 23-year-old woman, with a non-contributory medical and family history was referred due to rampant caries, that could not be attributed to any obvious aetiology. No sicca symptoms, previous parotid gland swelling or general symptoms were reported. Clinically, oral mucosa dryness and extended dental erosions and caries were observed, while the orifices of the excretory ducts of the parotid and submandibular salivary glands were not evident. Unstimulated and stimulated saliva flow rates were severely diminished, while a diagnostic biopsy of the lower lip revealed absence of minor salivary glands. Detailed hematologic and immunological investigations to exclude systemic disorders were also within normal limits. Ultrasound and magnetic resonance imaging revealed the absence of all major salivary glands, confirming the clinical diagnosis of congenital aplasia of the salivary glands. Results: Oral hygiene instructions and dietary advice were given while dental products with fluoride and saliva substitutes were administered and appropriate dental treatment was implemented. Regular dental follow-up was also advised. Conclusions: Timely diagnosis of aplasia of the salivary glands is important, considering the detrimental effects of the absence of saliva on oral health. Management consists of the use of saliva substitutes, nutritional adaptation, maintenance of oral health and regular dental follow-ups.
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- 2022
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31. Health-related quality of life & healthcare costs of symptoms and cardiovascular disease events in patients with atrial fibrillation: a longitudinal analysis of 27 countries from the EORP-AF General Long-Term Registry
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Walli-Attaei, M, primary, Little, M, additional, Luengo-Fernandez, R, additional, Gray, A, additional, Torbica, A, additional, Maggioni, A P, additional, Bairami, F, additional, Huculeci, R, additional, Aboyans, V, additional, Timmis, A D, additional, Vardas, P, additional, and Leal, J, additional
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- 2024
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32. Post-PCI corrected TIMI Frame Count predicts left ventricular global longitudinal strain at 90 days post-STEMI in thrombolysis-treated patients: A pre-specified analysis of the MIRTOS study
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Ioannis Anastasiou, Alexandros Patrianakos, Michail Vernardos, Emmanouil Foukarakis, Michail Pitarokoilis, Stylianos Petousis, Evangelos Zacharis, Maria Marketou, Emmanouil Skalidis, George Kochiadakis, Fragkiskos Parthenakis, Panos Vardas, and Michalis Hamilos
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STEMI ,Clopidogrel ,Ticagrelor ,LVEF ,LV-GLS ,Thrombolysis ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Introduction: Ticagrelor has been established as the P2Y12-inhibitor of choice in ST-segment elevation myocardial infarction (STEMI) patients undergoing primary percutaneous coronary intervention (PCI); however, its use has not been adequately studied in the context of thrombolysis. In the present study, we sought to investigate whether the administration of ticagrelor together with thrombolysis could result in a greater degree of left ventricular systolic function recovery compared to clopidogrel, at 90 days post-STEMI, as well as to evaluate post-PCI corrected TIMI Frame Count (CTFC) as a predictive marker of myocardial recovery in thrombolysis-treated patients. Material and methods: In this pre-specified analysis of the MIRTOS trial, the degree of change in left ventricular ejection fraction (ΔLVEF) and left ventricular longitudinal strain (ΔLV-GLS) from baseline to 90 days post-randomization in all patients who underwent conventional and speckle-tracking echocardiography at both timepoints was compared between the ticagrelor and clopidogrel groups. In addition, speckle-tracking echocardiographic measurements were evaluated for any correlations to post-PCI CTFC. Results: No statistically significant differences were detected between the ticagrelor and clopidogrel groups for ΔLVEF (+3.61 ± 5.08 % versus +2.21 ± 4.78 %; P = 0.18) and ΔLV-GLS (−1.53 ± 2.7 % versus −1.21 ± 3.05 %; P = 0.73). A strong negative correlation was found between post-PCI CTFC and the absolute value of LV-GLS at 90 days post-randomization (r = −0.33, P = 0.014). Conclusions: Our work suggests that both P2Y12-inhibitors are accompanied with a similar degree of myocardial recovery in the context of lytic therapy. Importantly, post-PCI microvascular integrity is a predictor of 3-month left ventricular systolic function in STEMI patients initially treated with thrombolysis.
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- 2022
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33. Functional Analysis of Viable Circulating Tumor Cells from Triple-Negative Breast Cancer Patients Using TetherChip Technology
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Vasileios Vardas, Julia A. Ju, Athina Christopoulou, Anastasia Xagara, Vassilis Georgoulias, Athanasios Kotsakis, Catherine Alix-Panabières, Stuart S. Martin, and Galatea Kallergi
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metastasis ,immune checkpoints ,EMT ,circulating tumor cells ,triple-negative breast cancer ,vinorelbine ,Cytology ,QH573-671 - Abstract
Metastasis, rather than the growth of the primary tumor, accounts for approximately 90% of breast cancer patient deaths. Microtentacles (McTNs) formation represents an important mechanism of metastasis. Triple-negative breast cancer (TNBC) is the most aggressive subtype with limited targeted therapies. The present study aimed to isolate viable circulating tumor cells (CTCs) and functionally analyze them in response to drug treatment. CTCs from 20 TNBC patients were isolated and maintained in culture for 5 days. Biomarker expression was identified by immunofluorescence staining and VyCap analysis. Vinorelbine-induced apoptosis was evaluated based on the detection of M30-positive cells. Our findings revealed that the CTC absolute number significantly increased using TetherChips analysis compared to the number of CTCs in patients’ cytospins (p = 0.006) providing enough tumor cells for drug evaluation. Vinorelbine treatment (1 h) on live CTCs led to a significant induction of apoptosis (p = 0.010). It also caused a significant reduction in Detyrosinated α-tubulin (GLU), programmed death ligand (PD-L1)-expressing CTCs (p < 0.001), and disruption of McTNs. In conclusion, this pilot study offers a useful protocol using TetherChip technology for functional analysis and evaluation of drug efficacy in live CTCs, providing important information for targeting metastatic dissemination at a patient-individualized level.
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- 2023
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34. Mycobacterium marinum: A Case-Based Narrative Review of Diagnosis and Management
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Giorgos Tsiolakkis, Angelos Liontos, Sempastian Filippas-Ntekouan, Rafail Matzaras, Eleftheria Theodorou, Michail Vardas, Georgia Vairaktari, Anna Nikopoulou, and Eirini Christaki
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mycobacteria ,mycobacterial infections ,Mycobacterium marinum ,skin and soft tissue infection ,skin lesions ,non-tuberculous mycobacteria ,Biology (General) ,QH301-705.5 - Abstract
Skin and soft tissue infections caused by non-tuberculous mycobacteria are occurring more frequently in recent years. However, chronic skin and soft tissue lesions present a challenge for clinicians, as the diagnostic work-up and definitive diagnosis require knowledge and available laboratory resources. We present here the case of a 66-year-old male patient who presented with painful abscess-like nodules on his right hand and forearm, which worsened after treatment with an anti-TNF-a agent. The fluid specimen taken from the lesion was positive for mycobacteria according to the acid-fast stain. Mycobacterium marinum was identified, first by next-generation sequencing and finally grown on culture, after eight weeks. Acknowledging the complexity of diagnosing and managing infections by non-tuberculous mycobacteria, and especially Mycobacterium marinum, we provide a review of the current epidemiology, clinical characteristics, diagnosis and management of Mycobacterium marinum infection.
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- 2023
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35. Oral Complications of Head and Neck Cancer Therapy
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Kouri Maria, Vadalouca Athina, Kouloulias Vasilios, Papadopoulou Erofili, Vardas Emmanouil, Kyrodimos Euthimios, Trichas Miltiadis, Galitis Evangelos, Zygogianni Anna, Liakouli Zoi, Nicolatou-Galitis Ourania, and Psyrri Amanda
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oral complications ,head and neck cancer ,radiotherapy ,chemoradiotherapy ,targeted therapy ,immunotherapy ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Current therapies for Head and Neck cancer treatment are extremely advanced. Though, they cause oral complications which have deleterious effects on basic life functions, affect oral and overall health, may lead to significant morbidity and treatment discontinuation and have an impact on survivorship and quality of life. As new therapies are introduced, a new spectrum of oral complications is rising, compromising the mucosal integrity and the salivary function, that may not be recognized, reported and treated properly. Oral complications, often permanent and extremely painful, may include mucositis, xerostomia, dysgeusia, infections, trismus and fibrosis, risk of dental disease and necrosis of the jaw, neurosensory disorders and when targeted therapies and immunotherapy are involved, aphthoid and lichenoid lesions can also be reported. Increased awareness is required for the prevention and management of these complications, which can be best provided by a multidisciplinary team.
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- 2021
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36. Granulomatous mastitis, erythema nodosum and arthritis syndrome: case-based review
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Parperis, Konstantinos, Achilleos, Savvas, Costi, Egli, and Vardas, Michail
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- 2021
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37. Detection of abnormal left ventricular geometry in patients without cardiovascular disease through machine learning: An ECG‐based approach
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Eleni Angelaki, Maria E. Marketou, Georgios D. Barmparis, Alexandros Patrianakos, Panos E. Vardas, Fragiskos Parthenakis, and Giorgos P. Tsironis
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electrocardiogram ,hypertension ,hypertrophy ,machine learning ,remodeling ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Abstract Cardiac remodeling is recognized as an important aspect of cardiovascular disease (CVD) progression. Machine learning (ML) techniques were applied to basic clinical parameters and electrocardiographic features, in order to detect abnormal left ventricular geometry (LVG) even before the onset of left ventricular hypertrophy (LVH), in a population without established CVD. The authors enrolled 528 patients with and without essential hypertension, but no other indications of CVD. All patients underwent a full echocardiographic evaluation and were classified into 3 groups; normal geometry (NG), concentric remodeling without LVH (CR), and LVH. Abnormal LVG was identified as increased relative wall thickness (RWT) and/or left ventricular mass index (LVMi). The authors trained supervised ML models to classify patients with abnormal LVG and calculated SHAP values to perform feature importance and interaction analysis. Hypertension, age, body mass index over the Sokolow‐Lyon voltage, QRS‐T angle, and QTc duration were some of the most important features. Our model was able to distinguish NG from CR+LVH combined, with 87% accuracy on an unseen test set, 75% specificity, 97% sensitivity, and area under the receiver operating curve (AUC/ROC) equal to 0.91. The authors also trained our model to classify NG and CR (NG + CR) against those with LVH, with 89% test set accuracy, 93% specificity, 67% sensitivity, and an AUC/ROC value of 0.89, for a 0.4 decision threshold. Our ML algorithm effectively detects abnormal LVG even at early stages. Innovative solutions are needed to improve risk stratification of patients without established CVD, and ML may enable progress in this direction.
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- 2021
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38. Bipolar radiofrequency catheter ablation of premature ventricular contractions arising from the left ventricular summit
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Dimitrios Asvestas, Theodoros Xenos, Panos Vardas, and Stylianos Tzeis
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Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Published
- 2021
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39. The role of M1 and M2 macrophage polarization in progression of medication-related osteonecrosis of the jaw
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Paschalidi, Polytimi, Gkouveris, Ioannis, Soundia, Akrivoula, Kalfarentzos, Evangelos, Vardas, Emmanouil, Georgaki, Maria, Kostakis, Georgios, Erovic, Boban M., Tetradis, Sotirios, Perisanidis, Christos, and Nikitakis, Nikolaos G.
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- 2021
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40. The Society of Thoracic Surgeons 2023 Clinical Practice Guidelines for the Surgical Treatment of Atrial Fibrillation.
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Wyler von Ballmoos, Moritz C., Hui, Dawn S., Mehaffey, J. Hunter, Malaisrie, S. Chris, Vardas, Panos N., Gillinov, A. Marc, Sundt, Thoralf M., and Badhwar, Vinay
- Abstract
The Society of Thoracic Surgeons 2023 Clinical Practice Guidelines for the Surgical Treatment of Atrial Fibrillation incorporate the most recent evidence for surgical ablation and left atrial appendage occlusion in different clinical scenarios. Substantial new evidence regarding the risks and benefits of surgical left atrial appendage occlusion and the long-term benefits of surgical ablation has been produced in the last 5 years. Compared with the 2017 clinical practice guideline, the current update has an emphasis on surgical ablation in first-time, nonemergent cardiac surgery and its long-term benefits, an extension of the recommendation to perform surgical ablation in all patients with atrial fibrillation undergoing first-time, nonemergent cardiac surgery, and a new class I recommendation for left atrial appendage occlusion in all patients with atrial fibrillation undergoing first-time, nonemergent cardiac surgery. Further guidance is provided for patients with structural heart disease and atrial fibrillation being considered for transcatheter valve repair or replacement, as well as patients in need of isolated left atrial appendage management who are not candidates for surgical ablation. The importance of a multidisciplinary team assessment, treatment planning, and long-term follow-up are reiterated in this clinical practice guideline with a class I recommendation, along with the other recommendations from the 2017 guidelines that remained unchanged in their class of recommendation and level of evidence. [ABSTRACT FROM AUTHOR]
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- 2024
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41. Survivin and caspases serum protein levels and survivin variants mRNA expression in sepsis
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Marianna Miliaraki, Panagiotis Briassoulis, Stavroula Ilia, Aikaterini Polonifi, Marina Mantzourani, Efrossini Briassouli, Konstantinos Vardas, Serafim Nanas, Aikaterini Pistiki, Maria Theodorakopoulou, Theonymfi Tavladaki, Anna Maria Spanaki, Eumorfia Kondili, Helen Dimitriou, Sotirios Tsiodras, Dimitrios Georgopoulos, Apostolos Armaganidis, George Daikos, and George Briassoulis
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Medicine ,Science - Abstract
Abstract Sepsis is a dysregulated host response to infection related to devastating outcomes. Recently, interest has been shifted towards apoptotic and antiapoptotic pathobiology. Apoptosis is executed through the activation of caspases regulated by a number of antiapoptotic proteins, such as survivin. The survivin and caspases’ responses to sepsis have not yet been elucidated. This is a multicenter prospective observational study concerning patients with sepsis (n = 107) compared to patients with traumatic systemic inflammatory response syndrome (SIRS) (n = 75) and to healthy controls (n = 89). The expression of survivin was quantified through real-time quantitative polymerase chain reaction for the different survivin splice variants (wild type-WT, ΔEx3, 2B, 3B) in peripheral blood leukocytes. The apoptotic or antiapoptotic tendency was specified by measuring survivin-WT, caspase-3, and -9 serum protein concentrations through enzyme-linked immunosorbent assay. The survivin-WT, -2B, -ΔΕx3 mRNA, survivin protein, and caspases showed an escalated increase in SIRS and sepsis, whereas survivin-3B was repressed in sepsis (p
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- 2021
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42. Remote Cardiac Rhythm Monitoring in the Era of Smart Wearables: Present Assets and Future Perspectives
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Anastasia Xintarakou, Vasileios Sousonis, Dimitrios Asvestas, Panos E. Vardas, and Stylianos Tzeis
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smart wearable devices ,remote monitoring ,sensors ,arrhythmia detection ,heart rate ,cardiac function ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Remote monitoring and control of heart function are of primary importance for patient evaluation and management, especially in the modern era of precision medicine and personalized approach. Breaking technological developments have brought to the frontline a variety of smart wearable devices, such as smartwatches, chest patches/straps, or sensors integrated into clothing and footwear, which allow continuous and real-time recording of heart rate, facilitating the detection of cardiac arrhythmias. However, there is great diversity and significant differences in the type and quality of the information they provide, thus impairing their integration into daily clinical practice and the relevant familiarization of practicing physicians. This review will summarize the different types and dominant functions of cardiac smart wearables available in the market. Furthermore, we report the devices certified by official American and/or European authorities and the respective sources of evidence. Finally, we comment pertinent limitations and caveats as well as the potential answers that flow from the latest technological achievements and future perspectives.
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- 2022
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43. Survivin and caspases serum protein levels and survivin variants mRNA expression in sepsis
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Miliaraki, Marianna, Briassoulis, Panagiotis, Ilia, Stavroula, Polonifi, Aikaterini, Mantzourani, Marina, Briassouli, Efrossini, Vardas, Konstantinos, Nanas, Serafim, Pistiki, Aikaterini, Theodorakopoulou, Maria, Tavladaki, Theonymfi, Spanaki, Anna Maria, Kondili, Eumorfia, Dimitriou, Helen, Tsiodras, Sotirios, Georgopoulos, Dimitrios, Armaganidis, Apostolos, Daikos, George, and Briassoulis, George
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- 2021
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44. Oral Side Effects in Patients with Metastatic Renal Cell Carcinoma Receiving the Antiangiogenic Agent Pazopanib—Report of Three Cases
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Erofili Papadopoulou, Emmanouil Vardas, Styliani Tziveleka, Maria Georgaki, Maria Kouri, Konstantinos Katoumas, Evangelia Piperi, and Nikolaos G. Nikitakis
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pazopanib ,angiogenesis inhibitors ,gingival bleeding ,jaw osteonecrosis ,oral side effects ,metastatic renal cell carcinoma ,Dentistry ,RK1-715 - Abstract
Pazopanib is a potent multi-kinase inhibitor that hinders angiogenesis and blocks tumor growth. It has been approved for the treatment of metastatic renal cell carcinoma (mRCC) and advanced soft tissue sarcoma. There is emerging evidence that bleeding is a common adverse effect of pazopanib and other targeted therapies in patients with mRCC. In addition, jaw osteonecrosis related to pazopanib was recently described in the literature. We report three cases of patients with mRCC who developed adverse oral events related to pazopanib. The first patient, treated with pazopanib as monotherapy, presented with gingival bleeding and oral burning sensation. The other two patients receiving pazopanib as monotherapy and pazopanib followed by sunitinib, respectively, presented complaining about mandibular pain; a diagnosis of medication-related osteonecrosis of the jaw (MRONJ) was rendered in both cases. Gingival bleeding and MRONJ may develop as oral side effects of pazopanib use. The cases presented here aim to alert and inform health care professionals about the risk of adverse oral events in patients with mRCC receiving the antiangiogenic agent pazopanib.
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- 2022
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45. Disseminated metastatic cutaneous melanoma to pancreas and upper gastrointestinal tract diagnosed by endoscopic ultrasound: an unusual case
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Voudoukis, Evangelos, Mpitouli, Afroditi, Giannakopoulou, Konstantina, Velegraki, Magdalini, Datseri, Galateia, Bachlitzanaki, Maria, Kazamias, Georgios, Fahouridi, Anthi, Mastorakis, Emmanouil, Vardas, Emmanouil, Kontopodis, Emmanouil, and Paspatis, Gregorios
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- 2020
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46. The use of crevicular fluid to assess markers of inflammation and angiogenesis, IL-17 and VEGF, in patients with solid tumors receiving zoledronic acid and/or bevacizumab
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Papadopoulou, Erofili, Nicolatou-Galitis, Ourania, Papassotiriou, Ioannis, Linardou, Helena, Karagianni, Aikaterini, Tsixlakis, Konstantinos, Tarampikou, Anthi, Michalakakou, Kelly, Vardas, Emmanouil, and Bafaloukos, Dimitrios
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- 2020
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47. Blunt aortic injuries in the new era: radiologic findings and polytrauma risk assessment dictates management strategy
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Payne, Rachel Elizabeth, Nygaard, Rachel Michelle, Fernandez, Joss Dean, Sahgal, Prateek, Richardson, Chad John, Bashir, Mohammad, Parekh, Kalpaj, Vardas, Panos Nicolas, Suzuki, Yoshikazu, Corvera, Joel, Krook, Jon Christopher, and Calcaterra, Domenico
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- 2019
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48. Histological and Biochemical Analysis after Posterior Mandibular Displacement in Rats
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Ioannis Lyros, Despoina Perrea, Konstantinos Tosios, Nikolaos Nikitakis, Ioannis A. Tsolakis, Efstratios Ferdianakis, Eleni Fora, Theodoros Lykogeorgos, Michael P. Maroulakos, Emmanouil Vardas, Maria Georgaki, Erofili Papadopoulou, and Apostolos I. Tsolakis
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mandibular posterior displacement ,condylar growth ,rat ,class III malocclusion ,orthodontic treatment ,osteoprotegerin ,Veterinary medicine ,SF600-1100 - Abstract
The present study aimed to investigate any biochemical and histological changes of the rat condyle and mandible in animals that had sustained mandibular growth restriction. Seventy-two male Wistar rats were divided into two equal groups, experimental and control. Each group consisted of three equal subgroups. The animals were sacrificed 30, 60, and 90 days after the start of the experiment. Blood samples were collected from the eye, and the osteoprotegerin (OPG), Receptor Activator of Nuclear Factor Kappa B Ligand (RANKL), and Macrophage Colony-Stimulating factor (MCSF)concentrations were measured by using enzyme-linked immunosorbent assay (ELISA) kits. A histological analysis was performed on the mandibular condyles. The blood serum values of OPG, RANKL, and MCSF did not exhibit any statistically significant difference between groups or subgroups. However, significant histological changes became evident after a histomorphometric condylar examination was performed. The Bone Surface/Total Surface ratio appeared reduced in the anterior and posterior regions of the condyle. In addition, the Posterior Condylar Cartilage Thickness was measured and determined to be significantly diminished. The present intervention that employed orthodontic/orthopedic devices did not prove to have any significant effect on the circulating proteins under study. Posterior displacement of the mandible may culminate only in local histological alterations in condylar cartilage thickness and its osseous microarchitecture.
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- 2022
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49. Variations in the costs of atrial fibrillation: a longitudinal study across 27 European and Central Asian countries
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Walli-Attaei, M, primary, Luengo-Fernandez, R, additional, Gray, A, additional, Torbica, A, additional, Maggioni, A P, additional, Bairami, F, additional, Huculeci, R, additional, Aboyans, V, additional, Timmis, A D, additional, Vardas, P, additional, and Leal, J, additional
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- 2023
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50. Atrial Fibrosis: Translational Considerations for the Management of AF Patients
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Stylianos Tzeis, Dimitrios Asvestas, and Panos Vardas
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Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Published
- 2019
- Full Text
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