1,250 results on '"Ventricular dyssynchrony"'
Search Results
2. Pacemaker-induced cardiomyopathy.
- Author
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Fletcher-Hall, Shirley
- Subjects
TREATMENT of cardiomyopathies ,HEART failure risk factors ,CARDIOMYOPATHIES ,VENTRICULAR remodeling ,DIFFERENTIAL diagnosis ,RISK assessment ,VENTRICULAR dysfunction ,CARDIAC pacemakers ,HEART failure ,DISEASE risk factors ,SYMPTOMS ,DISEASE complications - Abstract
Chronic right ventricular (RV) pacing is an often-unrecognized cause of cardiomyopathy, despite research that has revealed that chronic RV pacing can cause significant cardiomyopathy and heart failure, leading causes of hospitalization in the United States. Studies have found that chronic RV apical pacing results in ventricular dyssynchrony, reduced cardiac function, and heart failure. This article describes the deleterious effects of permanent cardiac pacemakers and their association with cardiomyopathy and heart failure. More research is needed to investigate other forms of pacing and treatment to prevent ventricular dyssynchrony and myocardial remodeling. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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3. Pacing induced tricuspid regurgitation: Does the lead matter?
- Author
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Yiu, Kelvin Kai‐Hang and Lau, Chu‐Pak
- Subjects
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ELECTRODES , *TRICUSPID valve diseases , *ARTIFICIAL implants , *RISK assessment , *CARDIAC pacing , *TREATMENT effectiveness , *CARDIAC pacemakers , *BRADYCARDIA , *DISEASE risk factors - Abstract
The author discusses a study published in the issue which evaluated the effects after leadless pacing (LPM) Micra implantation on biventricular function and tricuspid regurgitation (TR) in patients over a follow-up period of 12.2 months. Topics include the observed decline in both left ventricular (LV) and right ventricular (RV) systolic function overtime, importance of proper and early recognition of TR, and the frequency and under-recognition of pacing-induced TR.
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- 2023
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4. Dyssynchronous Heart Failure: A Clinical Review.
- Author
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Dikdan, Sean J., Co, Michael Lawrenz, and Pavri, Behzad B.
- Abstract
Purpose of the Review: Dyssynchrony occurs when portions of the cardiac chambers contract in an uncoordinated fashion. Ventricular dyssynchrony primarily impacts the left ventricle and may result in heart failure. This entity is recognized as a major contributor to the development and progression of heart failure. A hallmark of dyssynchronous heart failure (HF
d ) is left ventricular recovery after dyssynchrony is corrected. This review discusses the current understanding of pathophysiology of HFd and provides clinical examples and current techniques for treatment. Recent Findings: Data show that HFd responds poorly to medical therapy. Cardiac resynchronization therapy (CRT) in the form of conventional biventricular pacing (BVP) is of proven benefit in HFd , but is limited by a significant non-responder rate. Recently, conduction system pacing (His bundle or left bundle branch area pacing) has also shown promise in correcting HFd . Summary: HFd should be recognized as a distinct etiology of heart failure; HFd responds best to CRT. [ABSTRACT FROM AUTHOR]- Published
- 2022
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5. Predictors of right ventricular pacing-induced left ventricular dysfunction in pacemaker recipients with preserved ejection fraction.
- Author
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Abdelmohsen Sayed, Mohamed, Abd El Fatah Badran, Haitham, Khaled, Said, and Effat Fakhry, Emad
- Abstract
Copyright of Herzschrittmachertherapie und Elektrophysiologie is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
- Full Text
- View/download PDF
6. Trip HF Study: Triple Resynchronization in Paced Heeart Failure Patients
- Published
- 2019
7. Ineffective cardiac resynchronization pacing is associated with poor outcomes in a nationwide cohort analysis.
- Author
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Robbins-Juarez SY, Mittal S, Plummer C, Koehler JL, Stadler RW, Ghosh S, Klepfer RN, and Piccini JP
- Abstract
Background: Delivery of cardiac resynchronization therapy (CRT) requires left ventricular myocardial capture to achieve clinical benefits., Objective: We sought to determine whether ineffective pacing affects survival., Methods: Ineffective ventricular pacing (VP) was defined as the difference between the percentage of delivered CRT (%VP) and the percentage of EffectivCRT in CRT devices. Using the Optum de-identified electronic health record data set and Medtronic CareLink data warehouse, we identified patients implanted with applicable devices with at least 30 days of follow-up. Kaplan-Meier and Cox proportional hazards models assessed the effect of %VP and % ineffective VP on survival., Results: Among 7987 patients with 2.1 ± 1.0 years of follow-up, increasing ineffective VP was associated with decreasing survival: the highest observed survival was in the quartile with <0.08% ineffective VP and the lowest survival was in the quartile with >1.47% ineffective VP (85.1% vs 75.7% at 3 years; P < .001). As expected, patients with more than the median %VP of 97.7% had better survival than did patients with <97.7% VP (84.2% vs 77.8%; P < .001). However, patients who had >97.7% VP but >2% ineffective VP had similar survival to patients with <97.7% VP but ≤2% ineffective VP (81.6% vs 79.4%; P = .54). A multivariable Cox proportional hazards model demonstrated that <97.7% VP (adjusted hazard ratio 1.29; 95% confidence interval 1.14-1.46; P < .001) and >2% ineffective VP (hazard ratio 1.35; 95% confidence interval 1.18-1.54; P < .001) were both significantly associated with decreased survival., Conclusion: Ineffective VP is associated with decreased survival. In addition to maximizing the percentage of delivered CRT pacing, every effort should be made to minimize ineffective VP., Competing Interests: Disclosures Dr Mittal serves as a consultant to Boston Scientific and Medtronic. Drs Koehler, Stadler, Ghosh, and Klepfer are employees and shareholders of Medtronic. Dr Piccini is supported by R01AG074185 from the National Institutes of Aging. He also receives grants for clinical research from Abbott, the American Heart Association, Boston Scientific, iRhythm, and Philips and serves as a consultant to ABVF, Abbott, AbbVie, Boston Scientific, ElectroPhysiology Frontiers, Kardium, LivaNova, Medtronic, Milestone Pharmaceuticals, Sanofi, Philips, and UpToDate. The rest of the authors report no conflicts of interest., (Copyright © 2024 Heart Rhythm Society. Published by Elsevier Inc. All rights reserved.)
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- 2024
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8. Electrical management of heart failure: from pathophysiology to treatment.
- Author
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Prinzen, Frits W, Auricchio, Angelo, Mullens, Wilfried, Linde, Cecilia, and Huizar, Jose F
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ARRHYTHMIA ,ATRIAL flutter ,HEART failure ,BUNDLE-branch block ,CARDIAC pacing ,PATHOLOGICAL physiology ,HEART failure patients - Abstract
Electrical disturbances, such as atrial fibrillation (AF), dyssynchrony, tachycardia, and premature ventricular contractions (PVCs), are present in most patients with heart failure (HF). While these disturbances may be the consequence of HF, increasing evidence suggests that they may also cause or aggravate HF. Animal studies show that longer-lasting left bundle branch block, tachycardia, AF, and PVCs lead to functional derangements at the organ, cellular, and molecular level. Conversely, electrical treatment may reverse or mitigate HF. Clinical studies have shown the superiority of atrial and pulmonary vein ablation for rhythm control and AV nodal ablation for rate control in AF patients when compared with medical treatment. Ablation of PVCs can also improve left ventricular function. Cardiac resynchronization therapy (CRT) is an established adjunct therapy currently undergoing several interesting innovations. The current guideline recommendations reflect the safety and efficacy of these ablation therapies and CRT, but currently, these therapies are heavily underutilized. This review focuses on the electrical treatment of HF with reduced ejection fraction (HFrEF). We believe that the team of specialists treating an HF patient should incorporate an electrophysiologist in order to achieve a more widespread use of electrical therapies in the management of HFrEF and should also include individual conditions of the patient, such as body size and gender in therapy fine-tuning. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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9. His Bundle pacing for congenital complete AV block: An attempt to fix a broken heart?
- Author
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Piemontese, Giuseppe Pio, Ziacchi, Matteo, Statuto, Giovanni, Angeletti, Andrea, Massaro, Giulia, Bartoli, Lorenzo, and Biffi, Mauro
- Abstract
Congenital complete atrioventricular block (CCAVB) is usually due to failure of atrioventricular nodal conduction with preservation of the His‐Purkinje system. Most patients with CCAVB ultimately require pacemaker therapy to restore physiologic heart rates, dealing with the detrimental effects of chronic right ventricular (RV) pacing on cardiac structure and function. The ideal stimulation pattern aims to mimic the normal conduction to restore electromechanical coupling, preventing the harmful effects of lack of atrioventricular and inter‐intraventricular synchrony. This can be done through conduction system pacing. Using His bundle pacing (HBP) for cardiac resynchronization therapy in two complete congenital atrioventricular block patients, we have reported better exercise tolerance and echocardiographic improvements related to reversible left ventricular dysfunction that can be corrected by restoration of the normal activation pathway via the His‐Purkinje network. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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10. His Bundle pacing for congenital complete AV block: An attempt to fix a broken heart?
- Author
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Giuseppe Pio Piemontese, Matteo Ziacchi, Giovanni Statuto, Andrea Angeletti, Giulia Massaro, Lorenzo Bartoli, and Mauro Biffi
- Subjects
congenital atrioventricular block ,his bundle pacing ,left ventricular dysfunction ,ventricular dyssynchrony ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Abstract Congenital complete atrioventricular block (CCAVB) is usually due to failure of atrioventricular nodal conduction with preservation of the His‐Purkinje system. Most patients with CCAVB ultimately require pacemaker therapy to restore physiologic heart rates, dealing with the detrimental effects of chronic right ventricular (RV) pacing on cardiac structure and function. The ideal stimulation pattern aims to mimic the normal conduction to restore electromechanical coupling, preventing the harmful effects of lack of atrioventricular and inter‐intraventricular synchrony. This can be done through conduction system pacing. Using His bundle pacing (HBP) for cardiac resynchronization therapy in two complete congenital atrioventricular block patients, we have reported better exercise tolerance and echocardiographic improvements related to reversible left ventricular dysfunction that can be corrected by restoration of the normal activation pathway via the His‐Purkinje network.
- Published
- 2022
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11. Echocardiography Guided Cardiac Resynchronization Therapy (EchoCRT) (EchoCRT)
- Author
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University of Zurich
- Published
- 2018
12. Successful right anteroseptal manifest accessory pathway cryoablation in a six-month infant with dyssynchrony-induced dilated cardiomyopathy
- Author
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Pelin Köşger, Fatma Sevinç Şengül, Hasan Candaş Kafalı, Birsen Uçar, and Yakup Ergül
- Subjects
ablation ,dilated cardiomyopathy ,infant ,ventricular dyssynchrony ,wolff-parkinson-white syndrome. ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Published
- 2019
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13. Ventricular function and dyssynchrony in children with a functional single right ventricle using real time three‐dimensional echocardiography after fontan operation.
- Author
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Zhong, Shu‐wen, Zhang, Yu‐Qi, Chen, Li‐jun, Zhang, Zhi‐Fang, Wu, Lan‐Ping, and Hong, Wen‐jing
- Subjects
- *
ECHOCARDIOGRAPHY , *LEFT ventricular dysfunction , *RIGHT heart ventricle , *CONGENITAL heart disease , *MAGNETIC resonance imaging , *HEART ventricles , *TREATMENT effectiveness , *COMPARATIVE studies , *ELECTROCARDIOGRAPHY , *HEART physiology , *CARDIOPULMONARY bypass , *STROKE volume (Cardiac output) , *EVALUATION , *CHILDREN - Abstract
Background: This study aimed to evaluate the feasibility and clinical value of real time three‐dimensional echocardiography (RT‐3DE) for assessing ventricular systolic dysfunction and dyssynchrony in children with an functional single right ventricle (FSRV) having undergone the Fontan procedure. Methods: Twenty‐five children with an FSRV and 25 healthy children were enrolled in our study. RV volume analysis was performed compared with magnetic resonance imaging (MRI) as the reference standard in FSRV patients. The patients were divided into wide and narrow QRS interval groups. Global and regional functions of the RV in three compartments (inflow, body, and outflow) were compared between FSRV and control subjects, including RV systolic dyssynchrony indices of maximal difference of time to minimal volume (Tmsv‐Dif), standard deviation of time to minimal volume (Tmsv‐SD), maximal difference of time to minimal volume corrected by R‐R interval (Tmsv‐Dif%), and standard deviation of time to minimal volume corrected by R‐R interval (Tmsv‐SD%). Results: RT‐3DE measurements were significantly lower than MRI measurements for RV‐EDV, RV‐ESV, RV‐SV, and RVEF (p < 0.01).Compared with controls, patients with an FRSV had significantly higher dyssynchrony indices and significantly lower global EF in both narrow QRS interval and wide QRS interval groups. Tmsv‐SD% was shown to be most strongly correlated with MRI‐RVEF (r = −.570, p = 0.003). Conclusions: RT‐3DE tended to underestimate RV ventricular volume in children with FSRV. Children with an FSRV and either a wide or narrow QRS interval had reduced ventricular function and higher dyssynchrony than normal subjects. Worsening RV dyssynchrony is associated with overall decline in function after the Fontan operation. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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14. Echocardiography Evaluation of Left Ventricular Systolic Function, Systolic Dysfunction, and Ventricular Dyssynchrony
- Author
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Akiash, Nehzat, Alizadehasl, Azin, Sadeghpour, Anita, Sadeghpour, Anita, editor, and Alizadehasl, Azin, editor
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- 2018
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15. Effects of long-term right ventricular apex pacing on left ventricular dyssynchrony, morphology and systolic function.
- Author
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Xin, Man-kun, Gao, peng, and Zhang, Shu-yang
- Subjects
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VENTRICULAR ejection fraction , *MORPHOLOGY , *LEFT heart atrium , *LEFT ventricular hypertrophy , *GENDER - Abstract
Right ventricular apex (RVA) is still the most common implanted site in the world. There are a large number of RVA pacing population who have been carrying dual-chamber permanent pacemaker (PPM) over decades. Comparison of left ventricular dyssynchrony, morphology and systolic function between RVA pacing population and healthy population is unknown. This case-control study enrolled 61 patients suffered from complete atrioventricular block (III°AVB) for replacement of dual-chamber PPM. Then, 61 healthy controls matched with PPM patients in gender, age, follow-up duration and complications were included. The lead impedance, pacing threshold and sensing were compared between at implantation and long-term follow-up. Left ventricular (LV) dyssynchrony, morphology and systolic function were compared between RVA pacing population (RVA group) and healthy population (healthy group) at implantation (baseline) and follow-up. And clarify the predictors of LV systolic function in RVA group at follow-up. After 112.44 ± 34.94 months of follow-up, comparing with parameters at implantation, atrial lead impedance decreased significantly (690 ± 2397 Ω vs 613 ± 2257 Ω, p = 0.048); atrial pacing threshold has a increased trend and P-wave amplitude has a decreased trend, but there was no statistical differences; while, RVA ventricular lead threshold increased significantly (0.50 ± 0.23 V vs 0.91 ± 0.47 V, p < 0.001), impedance (902 ± 397 Ω vs 680 ± 257 Ω, p < 0.001) and R-wave amplitude (11.71 ± 9.40mv vs 7.00 ± 6.91 mv, p < 0.001) decreased significantly. Compared with healthy group, long-term RVA pacing significantly increased ventricular dyssynchrony (mean QRS duration, 156.21 ± 29.80 ms vs 97.08 ± 15.70 ms, p < 0.001), left atrium diameter (LAD, 40.61 ± 6.15 mm vs 37.49 ± 4.80 mm, p = 0.002), left ventricular end-diastolic diameter (LVEDD, 49.15 ± 5.93 mm vs 46.41 ± 3.80 mm, p = 0.003), left ventricular hypertrophy (LVMI, 121.86 ± 41.52 g/m2 vs 98.41 ± 25.29 g/m2, p < 0.001), significantly deteriorated degree of tricuspid regurgitation (p < 0.001), and significantly decreased left ventricular ejection fraction (LVEF, 61.38 ± 8.10% vs 64.64 ± 5.85%, p = 0.012), but after long-term RVA pacing, the mean LVEF was still more than 50%. Long-term RVA group LVEF was negatively correlated with preimplantation LVMI (B = -0.055, t = −2.244, p = 0.029), LVMI at follow-up (B = −0.081, t = −3.864, p = 0.000) and tricuspid regurgitation at follow-up (B = −3.797, t = −3.599, p = 0.001). In conclusion, although long-term RVA pacing has significantly effects on left ventricular dyssynchrony, morphology and systolic function in III°AVB patients, the mean LVEF is still >50%. High preimplantation LVMI can predict the decline of LVEF. • We have compared long-term changes of RVA pacing lead parameters as well as LV asynchrony, morphology and function difference between RVA pacing and healthy people at follow-up. • Furthermore, we have identified the predictors for decline of LVEF at follow-up. • To the best of our knowledge, this is the first study evaluation the comprehensive information of RVA pacing at 10 years follow-up, especially comparing with healthy people. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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16. Ventricular activation pattern assessment during right ventricular pacing: Ultra‐high‐frequency ECG study.
- Author
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Curila, Karol, Jurak, Pavel, Halamek, Josef, Prinzen, Frits, Waldauf, Petr, Karch, Jakub, Stros, Petr, Plesinger, Filip, Mizner, Jan, Susankova, Marketa, Prochazkova, Radka, Sussenbek, Ondrej, Viscor, Ivo, Vondra, Vlastimil, Smisek, Radovan, Leinveber, Pavel, and Osmancik, Pavel
- Subjects
- *
ARRHYTHMIA treatment , *ELECTRODES , *CONFIDENCE intervals , *RIGHT heart ventricle , *BUNDLE-branch block , *ARTIFICIAL implants , *CARDIAC pacing , *TREATMENT effectiveness , *ELECTROCARDIOGRAPHY , *DESCRIPTIVE statistics , *HIS bundle , *HEART conduction system - Abstract
Background: Right ventricular (RV) pacing causes delayed activation of remote ventricular segments. We used the ultra‐high‐frequency ECG (UHF‐ECG) to describe ventricular depolarization when pacing different RV locations. Methods: In 51 patients, temporary pacing was performed at the RV septum (mSp); further subclassified as right ventricular inflow tract (RVIT) and right ventricular outflow tract (RVOT) for septal inflow and outflow positions (below or above the plane of His bundle in right anterior oblique), apex, anterior lateral wall, and at the basal RV septum with nonselective His bundle or RBB capture (nsHBorRBBp). The timings of UHF‐ECG electrical activations were quantified as left ventricular lateral wall delay (LVLWd; V8 activation delay) and RV lateral wall delay (RVLWd; V1 activation delay). Results: The LVLWd was shortest for nsHBorRBBp (11 ms [95% confidence interval = 5–17]), followed by the RVIT (19 ms [11–26]) and the RVOT (33 ms [27–40]; p <.01 between all of them), although the QRSd for the latter two were the same (153 ms (148–158) vs. 153 ms (148–158); p =.99). RV apical capture not only had a longer LVLWd (34 ms (26–43) compared to mSp (27 ms (20–34), p <.05), but its RVLWd (17 ms (9–25) was also the longest compared to other RV pacing sites (mean values for nsHBorRBBp, mSp, anterior and lateral wall captures being below 6 ms), p <.001 compared to each of them. Conclusion: RVIT pacing produces better ventricular synchrony compared to other RV pacing locations with myocardial capture. However, UHF‐ECG ventricular dysynchrony seen during RVIT pacing is increased compared to concomitant capture of basal septal myocytes and His bundle or proximal right bundle branch. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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17. Three-dimensional guided selective right ventricular septal pacing preserves ventricular systolic function and synchrony in pediatric patients.
- Author
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Silvetti, Massimo Stefano, Pazzano, Vincenzo, Battipaglia, Irma, Saputo, Fabio Anselmo, Mizzon, Chiara, Gimigliano, Fabrizio, Ammirati, Antonio, Ravà, Lucilla, and Drago, Fabrizio
- Abstract
Background: Nonfluoroscopic 3-dimensional (3D) electroanatomic mapping systems (EAMs) have been developed to guide cardiac catheter navigation and reduce fluoroscopy. Selective right ventricular (RV) septal pacing could prevent pacing-induced left ventricular (LV) dysfunction.Objective: The purpose of this study was to determine whether EAM-guided selective RV septal pacing preserves LV contractility/synchrony in pediatric patients with complete atrioventricular block (CAVB) and no other congenital heart defects.Methods: Prospective analysis of children/adolescents who underwent EAM-guided selective RV pacing was performed. A 3D pacing map guided ventricular lead implantation at septal sites with narrow paced QRS. Serial echocardiograms were obtained after pacemaker implantation to monitor for function (volumes, ejection fraction [EF], global longitudinal/circumferential strain) and synchrony (interventricular mechanical delay, septal to posterior wall motion delay, systolic dyssynchrony index). Data are reported as median (25th-75th percentile).Results: Thirty-two CAVB patients (age 9.8 [7.0-14.0] years; 11 with a previous pacing system) underwent selective RV septal pacing (13 DDD, 19 VVIR pacemaker; midseptum 22, parahisian 7, RV outflow tract 3) with narrow paced QRS (110 [100-120] ms) and low radiation exposure. Follow-up over 24 (5-33) months showed preserved LV function and synchrony, without significant differences between pacing sites (midseptum-parahisian) and mode (VVIR-DDD). EF decreased after implantation in patients without previous pacing, although values were mainly within normal limits. Three parahisian patients underwent early lead repositioning.Conclusion: EAM-guided selective RV septal pacing is a feasible technique associated with preserved LV systolic function and synchrony and low radiation exposure in pediatric patients with CAVB. [ABSTRACT FROM AUTHOR]- Published
- 2021
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18. R-Wave Singularity: A New Morphological Approach to the Analysis of Cardiac Electrical Dyssynchrony
- Author
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Ping Zhan, Tao Li, Jinlong Shi, Guojing Wang, Buqing Wang, Hongyun Liu, and Weidong Wang
- Subjects
R-wave singularity ,Lipschitz exponent ,cardiac electrical dyssynchrony ,ventricular dyssynchrony ,autonomic nervous system ,heart rate variability ,Physiology ,QP1-981 - Abstract
R-wave singularity (RWS) measures the intermittence or discontinuousness of R waves. It has been broadly used in QRS (QRS complex of electrocardiogram) detection, electrocardiogram (ECG) beats classification, etc. In this article, we novelly developed RWS to the analysis of QRS morphology as the measurement of ventricular dyssynchrony and tested the hypothesis that RWS could enhance the discrimination between control and acute myocardial infarction (AMI) patients. Holter ECG recordings were obtained from the Telemetric and Holter ECG Warehouse database, among which database Normal was extracted as normal controls (n = 202) and database AMI (n = 93) as typical subjects of autonomic nervous system dysfunction and cardiac electrical dyssynchrony with high risk for cardiac arrhythmias and sudden cardiac death. Experimental results demonstrate that RWS measured by Lipschitz exponent calculated from 5-min Holter recordings was significantly less negative in early AMI and late AMI than that in Normal subjects for overall, elderly, and elderly male groups, which suggested the heterogeneous depolarization of the ventricular myocardium during AMI. Receiver operating characteristic curve analyses show that combined with heart rate variability parameters, Lipschitz exponent provides higher accuracy in distinguishing between the patients with AMI and healthy control subjects for overall, elderly, elderly male, and elderly female groups. In summary, our study demonstrates the significance of using RWS to probe the cardiac electrical dyssynchrony for AMI. Lipschitz exponent may be valuable and complementary for existing cardiac resynchronization therapy and autonomic nervous system assessment.
- Published
- 2020
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19. R-Wave Singularity: A New Morphological Approach to the Analysis of Cardiac Electrical Dyssynchrony.
- Author
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Zhan, Ping, Li, Tao, Shi, Jinlong, Wang, Guojing, Wang, Buqing, Liu, Hongyun, and Wang, Weidong
- Subjects
MYOCARDIAL infarction ,HEART beat ,ARRHYTHMIA ,CARDIAC pacing ,RECEIVER operating characteristic curves - Abstract
R-wave singularity (RWS) measures the intermittence or discontinuousness of R waves. It has been broadly used in QRS (QRS complex of electrocardiogram) detection, electrocardiogram (ECG) beats classification, etc. In this article, we novelly developed RWS to the analysis of QRS morphology as the measurement of ventricular dyssynchrony and tested the hypothesis that RWS could enhance the discrimination between control and acute myocardial infarction (AMI) patients. Holter ECG recordings were obtained from the Telemetric and Holter ECG Warehouse database, among which database Normal was extracted as normal controls (n = 202) and database AMI (n = 93) as typical subjects of autonomic nervous system dysfunction and cardiac electrical dyssynchrony with high risk for cardiac arrhythmias and sudden cardiac death. Experimental results demonstrate that RWS measured by Lipschitz exponent calculated from 5-min Holter recordings was significantly less negative in early AMI and late AMI than that in Normal subjects for overall, elderly, and elderly male groups, which suggested the heterogeneous depolarization of the ventricular myocardium during AMI. Receiver operating characteristic curve analyses show that combined with heart rate variability parameters, Lipschitz exponent provides higher accuracy in distinguishing between the patients with AMI and healthy control subjects for overall, elderly, elderly male, and elderly female groups. In summary, our study demonstrates the significance of using RWS to probe the cardiac electrical dyssynchrony for AMI. Lipschitz exponent may be valuable and complementary for existing cardiac resynchronization therapy and autonomic nervous system assessment. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
20. Evaluation of right ventricular dyssynchrony in patients with acute inferior myocardial infarction and its relation with mortality.
- Author
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Kanar, Batur Gonenc, Tigen, Mustafa Kursat, Sunbul, Murat, Cincin, Ahmet Altug, Gurel, Emre, Sayar, Nurten, Kepez, Alper, and Sadıc, Beste Ozben
- Subjects
- *
HEART ventricle diseases , *COMPARATIVE studies , *ECHOCARDIOGRAPHY , *RIGHT heart ventricle , *MYOCARDIAL infarction , *HEALTH outcome assessment , *DATA analysis software , *DESCRIPTIVE statistics , *CORONARY angiography - Abstract
Purpose: The aim of this study was to evaluate right ventricle (RV) dyssynchrony and its relation with mortality using speckle‐tracking echocardiography (STE) in patients with acute inferior myocardial infarction (IMI). Methods: One hundred and fifty‐eight consecutive patients with acute IMI treated with primary percutaneous coronary intervention, and 44 healthy subjects were included. RV myocardial involvement (RVMI) was defined as an elevation >1 mm in V1 or V4R and/or the presence of a culprit lesion at the proximal portion of the first RV marginal branch after reviewing coronary angiography. Patients were followed for 3 years to determine the cardiovascular mortality. Results: Overall, 70 patients with IMI had RVMI. IMI patients had significantly higher RV peak systolic longitudinal strain dyssynchrony (PLSSD) index, lower peak longitudinal systolic strain (PLSS), longer time to PLSS, and time to PLSS differences compared to healthy controls while the patients with RVMI had significantly worse values compared to patients without RVMI and healthy controls. Twenty‐seven patients (17.1%) died within 2 years. RVMI was more prevalent in mortality group, and they had significantly higher RV PSSD index, whereas they had lower RV free wall PLSS and longer time to PLSS differences. Receiver operating characteristics (ROC) analysis revealed that a RV PLSSD index > 65 ms predicted mortality with a sensitivity of 88.9% and specificity of 71.8% in IMI patients. Conclusions: Intra‐ and inter‐ventricular dyssynhcrony may develop in patients with acute IMI, especially in those with RV involvement, which might have a negative effect on the prognosis of these patients. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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21. ЕЛЕКТРОКАРДИОСТИМУЛАЦИЯ ОТ СНОПА НА ХИС.
- Author
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Славчев, Б., Даскалов, И., and Йовев, С.
- Subjects
CARDIAC pacing ,HIS bundle ,PATIENTS' rights ,ATRIAL fibrillation ,VENTRICULAR remodeling - Abstract
Copyright of Medical Review - Cardiovascular Diseases is the property of Medical University - Sofia, Central Medical Library and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2020
22. The quest for physiological pacing—Does one size fit all?
- Author
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Kaye, Gerry
- Subjects
- *
BRADYCARDIA treatment , *HEART failure treatment , *CARDIAC output , *CARDIAC pacing , *ELECTRODES , *HEART physiology , *HEART ventricles , *ARTIFICIAL implants - Abstract
Pacing is an established and ubiquitous treatment of bradycardias and some types of heart failure. The optimal pacing lead position which maximizes cardiac function and minimizes deterioration of ventricular function remains controversial. The desire to achieve a physiological pacing system that mimics cardiac function has led to the investigation of several potential pacing sites. This editorial provides an overview of past and current pacing lead position and summaries the current and future direction of physiological pacing. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
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23. The desire for physiological pacing: Are we there yet?
- Author
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Kaye, Gerry
- Subjects
- *
BRADYCARDIA , *CARDIAC pacing , *ELECTRODES , *HEART failure , *HIS bundle , *ARTIFICIAL implants , *CARDIOMYOPATHIES - Abstract
Pacing is a well established therapy for bradycardia support and certain types of heart failure. Despite technological advances the optimal pacing lead position remains controversial. Right ventricular pacing, particularly apical has been the site of choice but the induction of abnormal cardiac depolarization and the recognition of an increased risk of impairment of left ventricular systolic function, heart failure and mortality has driven a desire for a true physiological pacing system. A number of different lead positions have been determined and of these His bundle pacing appears to most closely mimic normal ventricular conduction. This article reviews the background to the development of physiological pacing, evaluates historical data for right ventricular pacing and the basis for change and new lead positions. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
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24. Electrical management of heart failure: from pathophysiology to treatment
- Author
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Frits W Prinzen, Angelo Auricchio, Wilfried Mullens, Cecilia Linde, and Jose F Huizar
- Subjects
CATHETER ABLATION ,CARDIAC-RESYNCHRONIZATION THERAPY ,resynchronization therapy ,heart failure ,Stroke Volume ,2021 ESC GUIDELINES ,premature ventricular contractions ,tachycardia ,ablation ,Cardiac Resynchronization Therapy ,Treatment Outcome ,VECTORCARDIOGRAPHIC QRS AREA ,HIS-BUNDLE ,PERSISTENT ATRIAL-FIBRILLATION ,RHYTHM CONTROL ,Humans ,atrial fibrillation ,ventricular dyssynchrony ,TACHYCARDIA-MEDIATED CARDIOMYOPATHY ,Cardiology and Cardiovascular Medicine ,EXPERT CONSENSUS STATEMENT ,BUNDLE-BRANCH BLOCK - Abstract
Electrical disturbances, such as atrial fibrillation (AF), dyssynchrony, tachycardia, and premature ventricular contractions (PVCs), are present in most patients with heart failure (HF). While these disturbances may be the consequence of HF, increasing evidence suggests that they may also cause or aggravate HF. Animal studies show that longer-lasting left bundle branch block, tachycardia, AF, and PVCs lead to functional derangements at the organ, cellular, and molecular level. Conversely, electrical treatment may reverse or mitigate HF. Clinical studies have shown the superiority of atrial and pulmonary vein ablation for rhythm control and AV nodal ablation for rate control in AF patients when compared with medical treatment. Ablation of PVCs can also improve left ventricular function. Cardiac resynchronization therapy (CRT) is an established adjunct therapy currently undergoing several interesting innovations. The current guideline recommendations reflect the safety and efficacy of these ablation therapies and CRT, but currently, these therapies are heavily underutilized. This review focuses on the electrical treatment of HF with reduced ejection fraction (HFrEF). We believe that the team of specialists treating an HF patient should incorporate an electrophysiologist in order to achieve a more widespread use of electrical therapies in the management of HFrEF and should also include individual conditions of the patient, such as body size and gender in therapy fine-tuning.
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- 2022
25. Prolonged Ventricular Dyssynchrony Due to Atrial Fibrillation and Pre-Excitation Syndrome Induced Cardiomyopathy.
- Author
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Iqbal, Mohammad, Litanto, Oddy, Munawar, Muhammad, Achmad, Chaerul, and Karwiky, Giky
- Subjects
- *
ATRIAL fibrillation , *WOLFF-Parkinson-White syndrome , *CARDIOMYOPATHIES - Abstract
Various degree of ventricular activation by accessory pathway (AP) and normal conduction system in a patient with pre-excited atrial fibrillation (AF) may lead to ventricle dyssynchrony and cardiomyopathy. [ABSTRACT FROM AUTHOR]
- Published
- 2019
26. Evolving Role of Permanent His Bundle Pacing in Conquering Dyssynchrony.
- Author
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Sharma, Parikshit S. and Vijayaraman, Pugazhendhi
- Abstract
Permanent His bundle pacing (PHBP) has shown significant clinical benefits in patients requiring ventricular pacing compared with conventional right ventricular pacing. There is an emerging role for PHBP in patients with interventricular dyssynchrony. This article reviews the mechanisms and the available data on the use of PHBP in overcoming dyssynchrony. [ABSTRACT FROM AUTHOR]
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- 2019
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27. Tissue Doppler Imaging in Cardiology Nowadays: Clinical Applications
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Nasr, Mireille and Kossaify, Antoine
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- 2017
28. Assessment of left ventricular dyssynchrony by speckle tracking echocardiography in children with duchenne muscular dystrophy
- Author
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Olivier Cazorla, Charlene Bredy, Marie Vincenti, Catherine Barrea, Albano Melli, Alain Lacampagne, Pascal Amedro, Jérémy Fauconnier, Kathleen Lavastre, Pierre Meyer, Lucie Gamon, Audrey Agullo, Nicolas Lanot, Hamouda Abassi, François Rivier, Thibault Mura, Gregoire De La Villeon, Centre Hospitalier Régional Universitaire [Montpellier] (CHRU Montpellier), Physiologie & médecine expérimentale du Cœur et des Muscles [U 1046] (PhyMedExp), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM), Centre Hospitalier Universitaire de Nîmes (CHU Nîmes), Cliniques Universitaires Saint-Luc [Bruxelles], Hôpital Haut-Lévêque [CHU Bordeaux], CHU Bordeaux [Bordeaux], Centre de recherche Cardio-Thoracique de Bordeaux [Bordeaux] (CRCTB), Université Bordeaux Segalen - Bordeaux 2-CHU Bordeaux [Bordeaux]-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut de rythmologie et modélisation cardiaque [Pessac] (IHU Liryc), Herrada, Anthony, UCL - SSS/IREC/PEDI - Pôle de Pédiatrie, and UCL - (SLuc) Service de cardiologie pédiatrique
- Subjects
Male ,medicine.medical_specialty ,Cardiac dyssynchrony ,Adolescent ,Heart Ventricles ,Duchenne muscular dystrophy ,Heart failure ,Speckle tracking echocardiography ,Ventricular Dysfunction, Left ,Predictive Value of Tests ,MESH: Child ,Internal medicine ,DMD ,MESH: Ventricular Dysfunction, Left ,MESH: Muscular Dystrophy, Duchenne ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Prospective Studies ,Child ,Ventricular dyssynchrony ,Speckle tracking ,MESH: Adolescent ,MESH: Humans ,[SDV.MHEP] Life Sciences [q-bio]/Human health and pathology ,business.industry ,Reproducibility of Results ,Paediatrics ,medicine.disease ,MESH: Male ,MESH: Predictive Value of Tests ,MESH: Prospective Studies ,Muscular Dystrophy, Duchenne ,MESH: Reproducibility of Results ,Echocardiography ,Cardiology ,MESH: Echocardiography ,MESH: Heart Ventricles ,business ,Cardiology and Cardiovascular Medicine ,[SDV.MHEP]Life Sciences [q-bio]/Human health and pathology - Abstract
Purpose-Prognosis of Duchenne muscular dystrophy (DMD) is related to cardiac dysfunction. Two dimensional-speckle tracking echocardiography (2D-STE) has recently emerged as a non-invasive functional biomarker for early detection of DMD-related cardiomyopathy. This study aimed to determine, in DMD children, the existence of a left ventricle (LV) dyssynchrony using 2D-STE analysis.Methods-This prospective controlled study enrolled 25 boys with DMD (mean age 11.0±3.5 years) with normal LV ejection fraction and 50 age-matched controls. Three measures were performed to assess LV mechanical dyssynchrony: the opposing-wall delays (longitudinal and radial analyses), the modified Yu index, and the time-to-peak delays of each segment. Feasibility and reproducibility of 2D-STE dyssynchrony were evaluated. Results-All three mechanical dyssynchrony criteria were significantly higher in the DMD group than in healthy subjects: (1) opposing-wall delays in basal inferoseptal to basal anterolateral segments (61.4±45.3 msec vs. 18.3±50.4 msec, Prespectively) and in mid inferoseptal to mid anterolateral segments (58.6±35.3 msec vs. 42.4±36.4 msec, Prespectively), (2) modified Yu index (33.3±10.1 msec vs. 28.5±8.1 msec, P, respectively), and (3) most of time-to-peak values, especially in basal and mid anterolateral segments. Feasibility was excellent and reliability was moderate to excellent, with ICC values ranging from 0.49 to 0.97.Conclusion-Detection of LV mechanical dyssynchrony using 2D-STE analysis is an easily and reproducible method in pediatrics. The existence of an early LV mechanical dyssynchrony visualized using 2D-STE analysis in children with DMD before the onset of cardiomyopathy represents a perspective for future pediatric drug trials in the DMD-related cardiomyopathy prevention. Clinical Trial Registration-Clinicaltrials.gov NCT02418338. Post-hoc study, registered on April 16, 2015.
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- 2021
29. Totally thoracoscopic concomitant left atrial appendage closure and left ventricular epicardial lead implantation
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Fabrizio Guarracini, Michele Di Mauro, Antonio M. Calafiore, Stefano Guarracini, Mark La Meir, Stefano Branzoli, Massimiliano Marini, Faculty of Medicine and Pharmacy, Vascular surgery, Surgical clinical sciences, Cardiac Surgery, RS: Carim - V04 Surgical intervention, and CTC
- Subjects
Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Percutaneous ,medicine.medical_treatment ,Atrial Appendage/diagnostic imaging ,Cardiac resynchronization therapy ,thoracoscopic surgery ,Internal medicine ,Occlusion ,medicine ,Thoracoscopy ,Humans ,cardiovascular diseases ,Ventricular dyssynchrony ,medicine.diagnostic_test ,business.industry ,appendage occlusion ,THORACOSCOPY ,Atrial fibrillation ,medicine.disease ,Treatment Outcome ,Heart Failure/complications ,Concomitant ,Heart failure ,cardiovascular system ,Cardiology ,CARDIAC RESYNCHRONIZATION THERAPY ,Surgery ,Cardiology and Cardiovascular Medicine ,business ,Atrial Fibrillation/complications - Abstract
Atrial fibrillation in patients with heart failure due to ventricular dyssynchrony needs decision-making on the rate and rhythm control strategies together with cardiac resynchronization therapy and antithrombotic prophylaxis. Transvenous biventricular pacing and percutaneous appendage closure in patients with heart failure and atrial fibrillation with high bleeding risk are valid therapeutic options but anatomical exclusion criteria could be present. Here, we report two patients who underwent successful totally thoracoscopic concomitant left appendage occlusion and epicardial left ventricular lead implantation.
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- 2021
30. Temporary coronary sinus pacing to improve ventricular dyssynchrony with cardiogenic shock: A case report
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Alexander Wang, Chi Chan Lee, Hsin-Ti Lin, Teressa Ju, Hsin Tseng, and Yi-Ching Lai
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medicine.medical_specialty ,business.industry ,Cardiogenic shock ,Heart failure ,Coronary sinus ,General Medicine ,medicine.disease ,Artificial pacemaker ,Cardiac resynchronization ,Internal medicine ,Case report ,otorhinolaryngologic diseases ,cardiovascular system ,medicine ,Cardiology ,cardiovascular diseases ,business ,Ventricular dyssynchrony - Abstract
BACKGROUND Temporary transvenous pacing through the coronary sinus is a novel approach rarely used in treating unstable bradycardia. This modality could provide cardiac pacing while achieving better ventricular synchrony. We present a case who received cardiac pacing through the coronary sinus and provide a summary of evidence in the current literature. CASE SUMMARY A 55-year-old woman with a history of advanced heart failure was admitted to the rehabilitation ward after a recent stroke. During hospitalization, she had paroxysmal atrial fibrillation with rapid ventricular response resulting from fluid overload. While atrial fibrillation was spontaneously reversed to sinus rhythm after diuresis, she developed multiple episodes of polymorphic ventricular tachycardia along with sinus bradycardia and prolonged QTc interval. She became hypotensive despite appropriate medical management. Pacing through her implantable cardioverter-defibrillator was attempted but worsened her hypotension. Ventricular dyssynchrony was suspected. Temporary transvenous atrial pacing through the coronary sinus was performed, which stabilized her blood pressure and improved end-organ perfusion. A permanent biventricular pacemaker was later implanted, and she was safely discharged to a nursing home. CONCLUSION Temporary transvenous pacing through the coronary sinus, a novel approach to treat unstable bradycardia, may reduce ventricular dyssynchrony.
- Published
- 2021
31. Atlas-Based Quantification of Myocardial Motion Abnormalities: Added-value for the Understanding of CRT Outcome?
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Duchateau, Nicolas, De Craene, Mathieu, Piella, Gemma, Hoogendoorn, Corné, Silva, Etelvino, Doltra, Adelina, Mont, Lluís, Castel, Ma Angeles, Brugada, Josep, Sitges, Marta, Frangi, Alejandro F., Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Camara, Oscar, editor, Pop, Mihaela, editor, Rhode, Kawal, editor, Sermesant, Maxime, editor, Smith, Nic, editor, and Young, Alistair, editor
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- 2010
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32. Prognostic Significance of Left Ventricular Dyssynchrony Assessed with Nuclear Cardiology for the Prediction of Major Cardiac Events after Revascularization
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Masatsugu Miyagawa, Shunichi Yoda, Misa Hayase, Yasuyuki Suzuki, Yusuke Hori, Hidesato Fujito, Yasuo Okumura, Naoya Matsumoto, and Takumi Hatta
- Subjects
medicine.medical_specialty ,gated single photon emission computed tomography ,medicine.medical_treatment ,Ischemia ,Cardiology ,risk stratification ,Coronary Artery Disease ,Revascularization ,Coronary artery disease ,Myocardial perfusion imaging ,Ventricular Dysfunction, Left ,Internal medicine ,Internal Medicine ,medicine ,Humans ,Myocardial infarction ,Ventricular dyssynchrony ,Retrospective Studies ,Tomography, Emission-Computed, Single-Photon ,medicine.diagnostic_test ,business.industry ,Unstable angina ,Myocardial Perfusion Imaging ,General Medicine ,medicine.disease ,Prognosis ,left ventricular mechanical dyssynchrony ,Heart failure ,Original Article ,revascularization ,business - Abstract
Objective This retrospective study was aimed at determining whether or not stress phase bandwidth (SPBW), a left ventricular (LV) mechanical dyssynchrony index, predicts major cardiac events (MCEs) and stratifies the risk of those in patients with coronary artery disease (CAD) who undergo revascularization. Methods Patients were followed up to confirm the prognosis for at least one year. The SPBW was calculated by a phase analysis using the Heart Risk View-F software program. The composite endpoint was the onset of MCEs, consisting of cardiac death, non-fatal myocardial infarction, unstable angina pectoris, and severe heart failure requiring hospitalization. Patients The study subjects were 332 patients with CAD who underwent coronary angiography and revascularization after confirming ≥5% ischemia detected by rest 201Tl and stress 99mTc-tetrofosmin electrocardiogram-gated single-photon emission computed tomography myocardial perfusion imaging. Results During the follow-up, 35 patients experienced MCEs of cardiac death (n=5), non-fatal myocardial infarction (n=3), unstable angina pectoris (n=11), and severe heart failure requiring hospitalization (n=16). A receiver operating characteristics analysis indicated that the optimal cut-off value of the SPBW was 52° for predicting MCEs, and the MCE rate was significantly higher in the patients with an SPBW >52° than in those with an SPBW ≤52°. Results of the multivariate analysis showed the SPBW and estimated glomerular filtration rate to be independent predictors for MCEs. In addition, the cut-off value of the SPBW significantly stratified the risk of MCEs according to the results of the Kaplan-Meier analysis. Conclusion Evaluating the SPBW before revascularization may help predict future MCEs in patients with CAD who intended to undergo treatment.
- Published
- 2021
33. Ventricular activation pattern assessment during right ventricular pacing
- Author
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Petr Stros, Frits W. Prinzen, Karol Curila, Jan Mizner, Pavel Jurák, Pavel Leinveber, Radka Prochazkova, Pavel Osmancik, Ivo Viscor, Petr Waldauf, Josef Halamek, Filip Plesinger, Jakub Karch, Marketa Susankova, Vlastimil Vondra, Radovan Smisek, Ondrej Sussenbek, Fysiologie, and RS: Carim - H06 Electro mechanics
- Subjects
medicine.medical_specialty ,Bundle of His ,Heart Ventricles ,Ventricular Septum ,030204 cardiovascular system & hematology ,high frequency ECG ,03 medical and health sciences ,Electrocardiography ,0302 clinical medicine ,Physiology (medical) ,Internal medicine ,Medicine ,Ventricular outflow tract ,Humans ,Ventricular inflow tract ,ventricular dyssynchrony ,cardiovascular diseases ,030212 general & internal medicine ,Ventricular dyssynchrony ,Right bundle branch ,ultra‐ ,pacing ,business.industry ,Cardiac Pacing, Artificial ,myocardial ,Ventricular pacing ,medicine.disease ,Myocardial Contraction ,Ventricular activation ,conductive system ,Cardiology ,Cardiology and Cardiovascular Medicine ,Lateral wall ,business ,Right anterior - Abstract
Background Right ventricular (RV) pacing causes delayed activation of remote ventricular segments. We used the ultrahigh-frequency ECG (UHF-ECG) to describe ventricular depolarization when pacing different RV locations.Methods In 51 patients, temporary pacing was performed at the RV septum (mSp); further subclassified as right ventricular inflow tract (RVIT) and right ventricular outflow tract (RVOT) for septal inflow and outflow positions (below or above the plane of His bundle in right anterior oblique), apex, anterior lateral wall, and at the basal RV septum with nonselective His bundle or RBB capture (nsHBorRBBp). The timings of UHF-ECG electrical activations were quantified as left ventricular lateral wall delay (LVLWd; V8 activation delay) and RV lateral wall delay (RVLWd; V1 activation delay).Results The LVLWd was shortest for nsHBorRBBp (11 ms [95% confidence interval = 5-17]), followed by the RVIT (19 ms [11-26]) and the RVOT (33 ms [27-40]; p < .01 between all of them), although the QRSd for the latter two were the same (153 ms (148-158) vs. 153 ms (148-158); p = .99). RV apical capture not only had a longer LVLWd (34 ms (26-43) compared to mSp (27 ms (20-34), p < .05), but its RVLWd (17 ms (9-25) was also the longest compared to other RV pacing sites (mean values for nsHBorRBBp, mSp, anterior and lateral wall captures being below 6 ms), p < .001 compared to each of them.Conclusion RVIT pacing produces better ventricular synchrony compared to other RV pacing locations with myocardial capture. However, UHF-ECG ventricular dysynchrony seen during RVIT pacing is increased compared to concomitant capture of basal septal myocytes and His bundle or proximal right bundle branch.
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- 2021
34. Acute Severe Functional Mitral Regurgitation After Non-Mitral Valve Cardiac Surgery—Left Ventricular Dyssynchrony as a Potential Mechanism
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Raul E. Espinosa, Hector I. Michelena, Kent H. Rehfeldt, and James A. Nelson
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medicine.medical_specialty ,Heart Ventricles ,Ischemia ,Hemodynamics ,030204 cardiovascular system & hematology ,Ventricular Function, Left ,law.invention ,Ventricular Dysfunction, Left ,03 medical and health sciences ,0302 clinical medicine ,030202 anesthesiology ,law ,Mitral valve ,Internal medicine ,Left atrial enlargement ,medicine ,Cardiopulmonary bypass ,Humans ,cardiovascular diseases ,Cardiac Surgical Procedures ,Ventricular dyssynchrony ,Mitral regurgitation ,business.industry ,Mitral Valve Insufficiency ,medicine.disease ,Cardiac surgery ,Anesthesiology and Pain Medicine ,medicine.anatomical_structure ,cardiovascular system ,Cardiology ,Mitral Valve ,Cardiology and Cardiovascular Medicine ,business - Abstract
Functional mitral regurgitation (MR) describes valve leakage in the absence of disease or damage to the mitral leaflets or subvalvular apparatus. Significant, new functional MR after cardiopulmonary bypass (CPB) may result from a number of intraoperative processes, including left ventricular (LV) ischemia and enlargement, left atrial enlargement secondary to increased filling pressure, and systolic anterior motion of the mitral valve after mitral repair. Assessment of new MR after CPB is important because it may direct hemodynamic maneuvers or prompt reinitiation of CPB if surgical intervention is deemed necessary. Described extensively in the electrophysiology literature but underreported as a cause of MR after CPB, LV dyssynchrony represents another possible mechanism of functional MR, in which resynchronization of conduction via pacing maneuvers may prove beneficial. Herein, a series of 4 patients in whom new MR was found after non-mitral valve cardiac surgery in the setting of normal LV systolic function is presented, and LV dyssynchrony is proposed as a major contributing factor. The findings suggested that the concomitant observation of new or worsened functional MR, together with normal global and regional LV systolic function, should lead the clinician to consider ventricular dyssynchrony as a possible cause. Attempts to improve or alter ventricular conduction should be considered before contemplating a return to CPB for mitral valve intervention.
- Published
- 2021
35. Layer-specific strain and dyssynchrony index alteration in new-onset systemic lupus erythematosus patients without cardiac symptoms
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Tingting Luo, Chenglong Fang, Zhenhua Wang, Zhen Chen, and Ermei Yu
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medicine.medical_specialty ,Ejection fraction ,Longitudinal strain ,business.industry ,medicine.disease ,New onset ,Internal medicine ,Cardiology ,medicine ,Circumferential strain ,Original Article ,Radiology, Nuclear Medicine and imaging ,In patient ,Ventricular dyssynchrony ,business ,Cardiac symptoms ,Subclinical infection - Abstract
BACKGROUND: Layer-specific speckle-tracking echocardiography (STE) is a noninvasive approach that assesses subclinical left ventricular dysfunction. We aimed to investigate the (I) alteration of layer-specific STE parameters and the dyssynchrony index; and (II) the disease parameters associated with layer-specific STE change in drug-naïve patients with new-onset systemic lupus erythematosus (SLE) without cardiac symptoms. METHODS: Thirty-five drug-naïve patients with new-onset SLE and twenty-five healthy controls were enrolled. All individuals received both conventional echocardiographic and two-dimensional STE assessment. The data of layer-specific global longitudinal strain (GLS), global circumferential strain (GCS), and peak systolic dispersion (PSD) were acquired in layer-specific STE. RESULTS: All patients had a normal left ventricular ejection fraction (LVEF)(mean LVEF: 58%) and conventional echocardiographic parameters were comparable between patients and controls. Decreased layer-specific GLS and elevated PSD were observed in SLE patients (whole layer GLS: −17.6%±3.0% versus −19.3%±2.6%, P=0.02; endocardial GLS: −20.0%±3.2% versus −22.1%±3.0%, P=0.01; epicardial GLS: −15.6%±2.7% versus −16.8%±2.4%, P=0.04; PSD: 41.0±18.9 versus 28.8±10.1 msec, P=0.007). In contrast, there was no difference in layer-specific GCS at three different levels between patients and controls (P>0.05). More severely impaired GLS was observed in patients with higher disease activity, high-risk antiphospholipid antibody (aPL) profile, or renal involvement. The PSD was increased in patients with higher disease activity or a high-risk aPL profile. Correlational analysis showed that GLS at three layers and PSD correlated with high-sensitivity C-reactive protein (hsCRP) levels (whole GLS: r=0.662, P
- Published
- 2021
36. Cardiac Resynchronisation Therapy: How to Identify Patients Who Will not Respond to Therapy
- Author
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Gulizia, M. M., Ragusa, A., Francese, G. M., and Raviele, Antonio, editor
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- 2006
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37. Pacing therapy for atrioventricular dromotropathy: a combined computational-experimental-clinical study
- Author
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Antonius M.W. van Stipdonk, Rick Schreurs, Frits W. Prinzen, Joost Lumens, Cornelis P. Allaart, Pierre Bordachar, F. Salden, Jos G. Maessen, Tammo Delhaas, Marion Kuiper, Justin G.L.M. Luermans, Peter Huntjens, Philippe C Wouters, Mathias Meine, Kevin Vernooy, Erik Willemen, Fysiologie, RS: Carim - H06 Electro mechanics, RS: Carim - H07 Cardiovascular System Dynamics, Biomedische Technologie, MUMC+: MA Med Staf Artsass CTC (9), CTC, MUMC+: MA Cardiothoracale Chirurgie (3), RS: Carim - V04 Surgical intervention, MUMC+: MA Med Staf Spec Cardiologie (9), RS: Carim - H01 Clinical atrial fibrillation, Cardiologie, Cardiology, ACS - Heart failure & arrhythmias, and ACS - Microcirculation
- Subjects
MECHANISM ,medicine.medical_specialty ,Cardiac output ,Swine ,Heart Ventricles ,Vascular damage Radboud Institute for Health Sciences [Radboudumc 16] ,Heart failure ,REGURGITATION ,First-degree atrioventricular block ,Ventricular Function, Left ,Physiology (medical) ,Internal medicine ,medicine ,Animals ,Humans ,PR interval ,Atrioventricular Block ,Ventricular dyssynchrony ,Ejection fraction ,Bundle branch block ,Haemodynamics ,business.industry ,PR-INTERVAL ,Cardiac Pacing, Artificial ,Biventricular pacing ,Stroke Volume ,Stroke volume ,medicine.disease ,DOPPLER ,Computer modelling ,DELAY ,Cardiology ,BLOCK ,CARDIAC RESYNCHRONIZATION THERAPY ,Cardiology and Cardiovascular Medicine ,business ,CHAMBER - Abstract
Aims Investigate haemodynamic effects, and their mechanisms, of restoring atrioventricular (AV)-coupling using pacemaker therapy in normal and failing hearts in a combined computational–experimental–clinical study. Methods and results Computer simulations were performed in the CircAdapt model of the normal and failing human heart and circulation. Experiments were performed in a porcine model of AV dromotropathy. In a proof-of-principle clinical study, left ventricular (LV) pressure and volume were measured in 22 heart failure (HF) patients (LV ejection fraction 230 ms) and narrow or non-left bundle branch block QRS complex. Computer simulations and animal studies in normal hearts showed that restoring of AV-coupling with unchanged ventricular activation sequence significantly increased LV filling, mean arterial pressure, and cardiac output by 10–15%. In computer simulations of failing hearts and in HF patients, reducing PR interval by biventricular (BiV) pacing (patients: from 300 ± 61 to 137 ± 30 ms) resulted in significant increases in LV stroke volume and stroke work (patients: 34 ± 40% and 26 ± 31%, respectively). However, worsening of ventricular dyssynchrony by using right ventricular (RV) pacing abrogated the benefit of restoring AV-coupling. In model simulations, animals and patients, the increase of LV filling and associated improvement of LV pump function coincided with both larger mitral inflow (E- and A-wave area) and reduction of diastolic mitral regurgitation. Conclusion Restoration of AV-coupling by BiV pacing in normal and failing hearts with prolonged AV conduction leads to considerable haemodynamic improvement. These results indicate that BiV or physiological pacing, but not RV pacing, may improve cardiac function in patients with HF and prolonged PR interval.
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- 2022
38. Echocardiographic assessment of left ventricular mechanical dyssynchrony – A practical approach
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Ahmed M. El Missiri
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Ventricular dyssynchrony ,Echocardiography ,Tissue Doppler ,Heart failure ,Three-dimensional echocardiography ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Echocardiographic assessment of left ventricular mechanical dyssynchrony (LVMD) received great interest with the appearance of Cardiac resynchronization therapy ever since the first successful implants. Recent guidelines still keep QRS duration as the main selection criterion for diagnosing the presence of LVMD. However, measurement of QRS duration, which is an electrical phenomenon, seems to provide only a crude estimate on myocardial activation and is poorly correlated with the presence of LVMD. Echocardiography seems to be a more reliable tool for correctly identifying candidates for CRT and thus reducing the number of clinical non-responders. Recently LMVD was found to be associated with other cardiac and noncardiac diseases. Therefore, echocardiographic assessment of LVMD will always remain of importance. The aim of this article is to present a simplified, step-wise approach for the assessment of LVMD which can be easily followed and performed by echocardiographers to produce reliable, reproducible results for the assessment of LVMD.
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- 2014
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39. Correlation of newer indices of dyssynchrony with clinical response in patients undergoing cardiac resynchronisation therapy
- Author
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Yash Lokhandwala, Gopi Krishna Panicker, Neeta Bachani, Aniruddha Vyas, and Chetan Rathi
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medicine.medical_specialty ,RD1-811 ,Heart Ventricles ,Heart failure ,030204 cardiovascular system & hematology ,Research Brief ,Cardiac Resynchronization Therapy ,Correlation ,03 medical and health sciences ,Biventricular pacemaker ,0302 clinical medicine ,Mitral valve ,Internal medicine ,medicine ,Humans ,Diseases of the circulatory (Cardiovascular) system ,In patient ,cardiovascular diseases ,030212 general & internal medicine ,Ventricular dyssynchrony ,business.industry ,medicine.disease ,medicine.anatomical_structure ,Echocardiography ,RC666-701 ,cardiovascular system ,Cardiology ,Surgery ,Velocity time integral ,Cardiology and Cardiovascular Medicine ,business ,Radial stress - Abstract
–: The benefits of CRT in select subsets of systolic heart failure patients with LBBB are proven. We prospectively evaluated conventional and newer echocardiographic parameters of left ventricular dyssynchrony in 35 patients who underwent CRT and were followed up after 6 months. Of the 33 surviving patients, 21 were echocardiographic responders and 24 were clinical responders. The parameters in clinical responders and non-responders were compared. The anatomic M Mode parameters of delays improved, while the radial strain and the mitral valve velocity time integral (MVVTI) did not show any significant change after CRT.
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- 2021
40. Characterization of Vortex Flow in a Mouse Model of Ventricular Dyssynchrony by Plane-Wave Ultrasound Using Hexplex Processing
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Colin K L Phoon, Orlando Aristizabal, Akshay Shekhar, Glenn I. Fishman, and Jeffrey A. Ketterling
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Cardiac function curve ,Acoustics and Ultrasonics ,Heart Ventricles ,Diastole ,Hemodynamics ,01 natural sciences ,Ventricular Function, Left ,Article ,Mice ,symbols.namesake ,Nuclear magnetic resonance ,0103 physical sciences ,medicine ,Animals ,Electrical and Electronic Engineering ,Ventricular dyssynchrony ,010301 acoustics ,Instrumentation ,Ultrasonography ,Physics ,business.industry ,Ultrasound ,medicine.disease ,Vortex ,medicine.anatomical_structure ,Ventricle ,symbols ,business ,Pericardium ,Doppler effect ,Blood Flow Velocity - Abstract
The rodent heart is frequently used to study human cardiovascular disease (CVD). Although advanced cardiovascular ultrasound imaging methods are available for human clinical practice, application of these techniques to small animals remains limited due to the temporal and spatial-resolution demands. Here, an ultrasound vector-flow workflow is demonstrated that enables visualization and quantification of the complex hemodynamics within the mouse heart. Wild type (WT) and fibroblast growth factor homologous factor 2 (FHF2)-deficient mice (Fhf2 $^{\mathrm{KO/Y}}$ ), which present with hyperthermia-induced ECG abnormalities highly reminiscent of Brugada syndrome, were used as a mouse model of human CVD. An 18-MHz linear array was used to acquire high-speed (30 kHz), plane-wave data of the left ventricle (LV) while increasing core body temperature up to 41.5 °C. Hexplex (i.e., six output) processing of the raw data sets produced the output of vector-flow estimates (magnitude and phase); B-mode and color-Doppler images; Doppler spectrograms; and local time histories of vorticity and pericardium motion. Fhf2 $^{\mathrm{WT/Y}}$ mice had repeatable beat-to-beat cardiac function, including vortex formation during diastole, at all temperatures. In contrast, Fhf2 $^{\mathrm{KO/Y}}$ mice displayed dyssynchronous contractile motion that disrupted normal inflow vortex formation and impaired LV filling as temperature rose. The hexplex processing approach demonstrates the ability to visualize and quantify the interplay between hemodynamic and mechanical function in a mouse model of human CVD.
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- 2021
41. The Prevalence and Short-Term Outcomes of Ventricular Dyssynchrony after Right Ventricular Pacing
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Padoemwut Teerawongsakul, Nithi Tokavanich, Thipdhorn Aritajati, Anusang Chitsomkasem, Kritsana Tipcome, and Teetouch Ananwattanasuk
- Subjects
medicine.medical_specialty ,Ejection fraction ,business.industry ,Hazard ratio ,Cardiomyopathy ,Ventricular pacing ,medicine.disease ,Confidence interval ,Internal medicine ,Heart failure ,cardiovascular system ,medicine ,Cardiology ,cardiovascular diseases ,business ,Ventricular dyssynchrony ,Prospective cohort study - Abstract
Objective: Long-term right ventricular pacing has been associated with an increased risk of heart failure and cardiomyopathy. The pathophysiology of cardiomyopathy associated with right ventricular pacing remains unclear. We aim to evaluate the burden and short-term outcomes of ventricular dyssynchrony after immediate permanent pacemaker implantation. Materials and Methods: This prospective cohort study examined consecutive patients who had permanent pacemaker implantation at Vajira Hospital in 2019. Left ventricular systolic function, specifically left ventricular ejection fraction (LVEF) and echocardiographic ventricular dyssynchrony parameters were assessed. The endpoints included the prevalence of ventricular dyssynchrony, new-onset cardiomyopathy, heart failure, and death. The correlation between QRS complex duration, the burden of ventricular pacing, and echocardiographic ventricular dyssynchrony was measured. Results: Thirty-six consecutive patients underwent pacemaker implantation. The prevalence of mechanical ventricular dyssynchrony was 22.2% using the interventricular conduction delay method, 41.7% using LV pre-ejection period method, and 11.1% using the septal posterior wall motion abnormality method. Electrical ventricular dyssynchrony was 86.1% and new-onset cardiomyopathy was 17.1% after 3 months of permanent pacemaker implantation. The right ventricular pacing of more than 20% was significantly associated with cardiomyopathy (p < 0.022) and heart failure (log-rank, p = 0.049) within 3 months. But heart failure was not associated with mechanical ventricular dyssynchrony parameters (log-rank, p = 0.610; hazard ratio [HR], 1.53; 95% confidence interval [CI], 0.29 - 7.96; p = 0.613 for IVMD and log-rank, p = 0.398; HR, 0.04; 95% CI, 0.01 - 3316.7 for SPWMD). Conclusion: Mechanical and electrical ventricular dyssynchrony are common findings in right ventricular pacing. High-burden right ventricular pacing after 3 months of permanent pacemaker implantation is often associated with cardiomyopathy and heart failure, but mechanical and electrical ventricular dyssynchrony does not predict a short-term decline in left ventricular systolic function and heart failure.
- Published
- 2021
42. The CHA2DS2-VASc Score and Its Association with Long-Term Outcome in a Cardiac Resynchronization Therapy Population
- Author
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Christian Reitan, Pyotr G. Platonov, and Rasmus Borgquist
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medicine.medical_specialty ,education.field_of_study ,business.industry ,medicine.medical_treatment ,Population ,Area under the curve ,Cardiac resynchronization therapy ,Atrial fibrillation ,medicine.disease ,Outcome (probability) ,Internal medicine ,Heart failure ,Risk stratification ,Cardiology ,Medicine ,Pharmacology (medical) ,Cardiology and Cardiovascular Medicine ,business ,Ventricular dyssynchrony ,education - Abstract
Background: Cardiac resynchronization therapy (CRT) is commonly used in patients with heart failure and left ventricular dyssynchrony. Several scoring systems have been tested in order to predict long-term outcome. Although intended for use in patients with atrial fibrillation, we sought to assess the performance of the CHA2DS2-VASc score in a CRT population. Methods: Data on 796 consecutive CRT patients were retrospectively gathered from hospital records and healthcare registries. CHA2DS2-VASc scores were calculated, as well as other stratification scores for comparison. The outcomes were crude mortality, time to first heart failure hospitalization, and a composite of the 2. CHA2DS2-VASc score was evaluated against the end points with survival analyses and compared to other risk stratification scores. Results: The CHA2DS2-VASc score was significantly correlated with both outcomes in univariable and multivariable analysis adjusting for other known predictors of CRT outcome (unadjusted HR 1.28, 95% CI 1.21–1.36 and HR 1.19, 95% CI 1.13–1.25 for the mortality and heart failure hospitalization end points, respectively). Its performance compared well to other validated scores for the mortality end point (Harrell’s C: 0.61, range for other scoring systems: 0.57–0.65), as well as the heart failure hospitalization end point (Harrell’s C: 0.57, range of other scoring systems: 0.58–0.62). It correlated to 5- and 10-year survival with an area under the curve of 0.63 and 0.73, respectively. Conclusion: When tested for association with outcome in a CRT population, the CHA2DS2-VASc score correlates to increased mortality and risk of heart failure hospitalization. It performs similarly to CRT-specific scores. However, the results of this study indicate that all tested scores should be used with caution in CRT patients.
- Published
- 2021
43. How to Identify Patients Most Likely to Respond to Cardiac Resynchronization Therapy
- Author
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Gulizia, M. M., Francese, G. M., and Raviele, Antonio, editor
- Published
- 2004
- Full Text
- View/download PDF
44. Relationship of echocardiographic left ventricular dyssynchrony with QRS width on surface electrocardiogram in patients with systolic heart failure: An observational study
- Author
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Shabbir Ali Shaik and Sai Satish Oruganti
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medicine.medical_specialty ,Future studies ,RD1-811 ,Short Communication ,Heart Ventricles ,Heart Failure (HF) ,Electrocardiography ,Ventricular Dysfunction, Left ,QRS complex ,Internal medicine ,medicine ,Humans ,Diseases of the circulatory (Cardiovascular) system ,In patient ,cardiovascular diseases ,Ventricular dyssynchrony ,Ejection fraction (LVEF) ,Heart Failure ,business.industry ,Intraventricular conduction delay(IVCD) ,Left ventricle ,medicine.disease ,Surface electrocardiogram ,Echocardiography ,Qrs width ,RC666-701 ,Heart failure ,Left bundle branch block (LBBB) ,cardiovascular system ,Cardiology ,Surgery ,Observational study ,Electrocardiogram (ECG) ,Cardiology and Cardiovascular Medicine ,business ,Heart Failure, Systolic ,circulatory and respiratory physiology - Abstract
This study aimed to evaluate left ventricular dyssynchrony with QRS width on ECG in patients with systolic heart failure. 100 study patients were classified into two groups. Narrow QRS group-N- QRS (80-119 msec) and Wide QRS group-W- QRS (120-160 msec). Out of each 50 patients in W- QRS group, 38(76%) had LV dyssynchrony and 18 (36%) in N- QRS group had ventricular dyssynchrony. Dyssynchrony in narrow QRS patients with heart failure also needs attention as a therapeutic target in future studies.
- Published
- 2021
45. Case 155
- Author
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Mason, Pamela K., Natale, Andrea, editor, Al-Ahmad, Amin, editor, Wang, Paul J., editor, and DiMarco, John, editor
- Published
- 2011
- Full Text
- View/download PDF
46. Single-photon cardiac imaging in patients with cardiac implantable electrical devices
- Author
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Francesco Fallani, Mauro Biffi, Stefano Fanti, Igor Diemberger, Cinzia Valzania, Matteo Ziacchi, Cristian Martignani, Nazzareno Galiè, Rachele Bonfiglioli, Valzania C., Bonfiglioli R., Fallani F., Martignani C., Ziacchi M., Diemberger I., Biffi M., Fanti S., and Galie N.
- Subjects
Cardiac function curve ,medicine.medical_specialty ,medicine.medical_treatment ,Cardiac resynchronization therapy ,Heart failure ,030204 cardiovascular system & hematology ,Myocardial blood flow ,030218 nuclear medicine & medical imaging ,Cardiac Resynchronization Therapy ,Ventricular Dysfunction, Left ,03 medical and health sciences ,0302 clinical medicine ,Radionuclide angiography ,Spect imaging ,Internal medicine ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Ventricular dyssynchrony ,Cardiac imaging ,Tomography, Emission-Computed, Single-Photon ,medicine.diagnostic_test ,business.industry ,Myocardial Perfusion Imaging ,Reproducibility of Results ,Cardiacinnervation ,medicine.disease ,Dyssynchrony ,Viability ,SPECT ,cardiovascular system ,Cardiology ,Cardiology and Cardiovascular Medicine ,business ,Emission computed tomography - Abstract
Nuclear imaging techniques like single-photon emission computed tomography (SPECT) and radionuclide angiography have wide applications in patients receiving a cardiac implantable electrical device (CIED), who cannot usually undergo cardiac magnetic resonance. Our aim was to provide an update of single-photon imaging clinical applications, with a specific focus on CIED recipients. SPECT imaging is commonly used in CIED patients to assess myocardial perfusion, but it can also be used to evaluate myocardial viability, which is an important predictor of LV function improvement by cardiac resynchronization therapy (CRT). Radionuclide angiography has shown higher temporal resolution and reproducibility than SPECT in the evaluation of cardiac function and dyssynchrony. Left ventricular dyssynchrony as assessed by radionuclide angiography with phase analysis may be reliably used for CRT patient selection and evaluation of CRT response. SPECT imaging with meta-iodo-benzyl-guanidine allows for cardiac sympathetic innervation examination, which may be used for prognostic stratification of heart failure patients and prediction of ventricular tachyarrhythmias. Finally, promising results in CIED infection diagnosis have been shown by SPECT with radiolabeled autologous white blood cells.
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- 2020
47. Prediction of response to cardiac resynchronization therapy using a multi-feature learning method
- Author
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Virginie Le Rolle, Auriane Bidaut, Erwan Donal, Otto A. Smiseth, Arnaud Hubert, Elena Galli, Jens-Uwe Voigt, Alfredo Hernandez, Alban Gallard, Christophe Leclercq, Laboratoire Traitement du Signal et de l'Image (LTSI), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Santé et de la Recherche Médicale (INSERM), CHU Pontchaillou [Rennes], Oslo University Hospital [Oslo], University Hospitals Leuven [Leuven], Université de Rennes (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM), and ANR-16-CE19-0008,MAESTRo,Approche à base de modèles pour l'analyse du strain obtenu en échocardiographie 3D(2016)
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Male ,2D longitudinal strain ,medicine.medical_specialty ,Time Factors ,medicine.medical_treatment ,Cardiac resynchronization therapy ,Heart failure ,Speckle tracking echocardiography ,030204 cardiovascular system & hematology ,Ventricular Function, Left ,Decision Support Techniques ,Electrocardiography ,03 medical and health sciences ,QRS complex ,0302 clinical medicine ,Predictive Value of Tests ,Internal medicine ,Image Interpretation, Computer-Assisted ,Machine learning ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Cardiac Resynchronization Therapy Devices ,030212 general & internal medicine ,Ventricular dyssynchrony ,Cardiac imaging ,Aged ,Retrospective Studies ,Cardiac cycle ,business.industry ,Speckle-tracking echocardiography ,Signal Processing, Computer-Assisted ,Stroke Volume ,Recovery of Function ,Middle Aged ,medicine.disease ,Echocardiography, Doppler ,Europe ,Treatment Outcome ,medicine.anatomical_structure ,Ventricle ,Cardiology ,Female ,[SDV.IB]Life Sciences [q-bio]/Bioengineering ,Cardiology and Cardiovascular Medicine ,business - Abstract
International audience; We hypothesized that a multiparametric evaluation, based on the combination of electrocardiographic and echocardiographic parameters, could enhance the appraisal of the likelihood of reverse remodeling and prognosis of favorable clinical evolution to improve the response of cardiac resynchronization therapy (CRT). Three hundred and twenty-three heart failure patients were retrospectively included in this multicenter study. 221 patients (68%) were responders, defined by a decrease in left ventricle end-systolic volume ≥15% at the 6-month follow-up. In addition, strain data coming from echocardiography were analyzed with custom-made signal processing methods. Integrals of regional longitudinal strain signals from the beginning of the cardiac cycle to strain peak and to the instant of aortic valve closure were analyzed. QRS duration, septal flash and different other features manually extracted were also included in the analysis. The random forest (RF) method was applied to analyze the relative feature importance, to select the most significant features and to build an ensemble classifier with the objective of predicting response to CRT. The set of most significant features was composed of Septal Flash, E, E/A, E/EA, QRS, left ventricular end-diastolic volume and eight features extracted from strain curves. A Monte Carlo cross-validation method with 100 runs was applied, using, in each run, different random sets of 80% of patients for training and 20% for testing. Results show a mean area under the curve (AUC) of 0.809 with a standard deviation of 0.05. A multiparametric approach using a combination of echo-based parameters of left ventricular dyssynchrony and QRS duration helped to improve the prediction of the response to cardiac resynchronization therapy.
- Published
- 2020
48. Bi-Ventricular Myocardial Performance in Heart Failure: A New Approach to Evaluate Interventricular Dyssynchrony
- Author
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Paolo Pattoneri, Roberta Ceriati, Vittoriano Belforti, Giovanna Pelà, and Severino Aimi
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medicine.medical_specialty ,Ejection fraction ,business.industry ,medicine.medical_treatment ,Cardiac resynchronization therapy ,Diastole ,medicine.disease ,QRS complex ,medicine.anatomical_structure ,Tissue Doppler echocardiography ,Ventricle ,Internal medicine ,Heart failure ,cardiovascular system ,medicine ,Cardiology ,cardiovascular diseases ,Ventricular dyssynchrony ,business - Abstract
Aims: Patients with heart failure (HF) exhibit ventricular dyssynchrony with negative effects on ventricular systolic and diastolic performance and poor prognosis. There is no consensus about the best approach for estimating the dyssynchrony and for selecting candidates for resynchronization therapy (CRT). We sought to evaluate whether Myocardial Performance Index (MPI), calculated as differences between left and right ventricle (LV, RV), ∆MPI, represents a marker of interventricular dyssynchrony. Methods: The study included 40 patients (22 males, 18 females, mean age 71±13) with NYHA functional class II-III, chronic heart failure (77% ischaemic), in optimal drug therapy for at least three months. All patients underwent a complete two-dimensional and Tissue Doppler Echocardiography (TDE), including an assessment of MPI in both ventricles. Results: Significant correlations were found between ∆MPI and QRS (r = 0.41, p < 0.001), with NYHA (r = 0.66, p < 0.001), with SPWMD (r = 0.32, p < 0.05), with LV ejection fraction (r = -0.32, p < 0.05), with Spv wave at the septal site of LV (r = -0.32, p < 0.05), and with IVMD (r = 0.44, p < 0.001). Ten patients have been re-evaluated six months after CRT implantation, and ∆MPI significantly correlated with the difference between basal LVEF and six months after CRT implantation (r = 0.43, p < 0.04). Conclusion: The ∆MPI could represent an integrative marker of interventricular dyssynchrony and could be considered as a new parameter in the patient selection process to be undergone CRT.
- Published
- 2020
49. Electrical management of heart failure: from pathophysiology to treatment
- Author
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Prinzen, Frits W., Auricchio, Angelo, MULLENS, Wilfried, Linde, Cecilia, Huizar, Jose F., LInde, Cecilia/0000-0002-9039-6023, Prinzen, Frits W., Auricchio, Angelo, MULLENS, Wilfried, Linde, Cecilia, and Huizar, Jose F.
- Subjects
resynchronization therapy ,heart failure ,atrial fibrillation ,ventricular dyssynchrony ,tachycardia ,premature ventricular contractions ,ablation - Abstract
Electrical disturbances, such as atrial fibrillation (AF), dyssynchrony, tachycardia, and premature ventricular contractions (PVCs), are present in most patients with heart failure (HF). While these disturbances may be the consequence of HF, increasing evidence suggests that they may also cause or aggravate HF. Animal studies show that longer-lasting left bundle branch block, tachycardia, AF, and PVCs lead to functional derangements at the organ, cellular, and molecular level. Conversely, electrical treatment may reverse or mitigate HF. Clinical studies have shown the superiority of atrial and pulmonary vein ablation for rhythm control and AV nodal ablation for rate control in AF patients when compared with medical treatment. Ablation of PVCs can also improve left ventricular function. Cardiac resynchronization therapy (CRT) is an established adjunct therapy currently undergoing several interesting innovations. The current guideline recommendations reflect the safety and efficacy of these ablation therapies and CRT, but currently, these therapies are heavily underutilized. This review focuses on the electrical treatment of HF with reduced ejection fraction (HFrEF). We believe that the team of specialists treating an HF patient should incorporate an electrophysiologist in order to achieve a more widespread use of electrical therapies in the management of HFrEF and should also include individual conditions of the patient, such as body size and gender in therapy fine-tuning. Research of J.F.H. was funded by NIH/NHLBI (1R01HL139874-01; PI: J.F.H.), Department of Veteran Affairs Merit Grant (BX004861-01; PI: J.F.H.). Research of C.L. was funded by the Swedish Heart-Lung Foundation, Swedish Research Council, and Stockholm County Council.
- Published
- 2022
50. Ventricular dyssynchrony assessment using ultra-high frequency ECG technique.
- Author
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Jurak, Pavel, Halamek, Josef, Meluzin, Jaroslav, Plesinger, Filip, Postranecka, Tereza, Lipoldova, Jolana, Novak, Miroslav, Vondra, Vlastimil, Viscor, Ivo, Soukup, Ladislav, Klimes, Petr, Vesely, Petr, Sumbera, Josef, Zeman, Karel, Asirvatham, Roshini, Tri, Jason, Asirvatham, Samuel, Leinveber, Pavel, Asirvatham, Roshini S, and Asirvatham, Samuel J
- Abstract
Purpose: The aim of this proof-of-concept study is to introduce new high-dynamic ECG technique with potential to detect temporal-spatial distribution of ventricular electrical depolarization and to assess the level of ventricular dyssynchrony.Methods: 5-kHz 12-lead ECG data was collected. The amplitude envelopes of the QRS were computed in an ultra-high frequency band of 500-1000 Hz and were averaged (UHFQRS). UHFQRS V lead maps were compiled, and numerical descriptor identifying ventricular dyssynchrony (UHFDYS) was detected.Results: An electrical UHFQRS maps describe the ventricular dyssynchrony distribution in resolution of milliseconds and correlate with strain rate results obtained by speckle tracking echocardiography. The effect of biventricular stimulation is demonstrated by the UHFQRS morphology and by the UHFDYS descriptor in selected examples.Conclusions: UHFQRS offers a new and simple technique for assessing electrical activation patterns in ventricular dyssynchrony with a temporal-spatial resolution that cannot be obtained by processing standard surface ECG. The main clinical potential of UHFQRS lies in the identification of differences in electrical activation among CRT candidates and detection of improvements in electrical synchrony in patients with biventricular pacing. [ABSTRACT FROM AUTHOR]- Published
- 2017
- Full Text
- View/download PDF
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