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ventricle tachycardia

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https://www.readbyqxmd.com/read/28219755/a-congenital-diverticulum-of-the-left-ventricular-apex-manifested-by-stroke-and-recurrent-ventricular-tachycardia
#1
Gabriela Dostálová, Tomáš Paleček, Petr Kuchynka, Štěpán Havránek, Martin Mašek, Zuzana Hlubocká, Debora Karetová, Dan Wichterle, Jaroslava Dušková, Jaroslav Lindner, Aleš Linhart
Ventricular outpouchings include acquired abnormalities (aneurysms and pseudoaneurysms) and congenital ventricular diverticula (CVD). CVD represent rare cardiac pathologies. Although CVD is often associated with other cardiac and extracardiac congenital anomalies, it can also be incidentally observed in otherwise healthy subjects. CVD may lead to significant morbidity and even have lethal consequences. We describe a case of arrhythmogenic left ventricle (LV) apical CVD revealed by cardiac magnetic resonance imaging (CMRI) after being initially overlooked by echocardiography...
February 4, 2017: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
https://www.readbyqxmd.com/read/28217224/mortality-and-predictors-of-appropriate-implantable-cardioverter-defibrillator-therapy-in-japanese-patients-with-multicenter-automatic-defibrillator-implantation-trial-ii-criteria
#2
Yoshimori An, Kenji Ando, Yoshimitsu Soga, Akihiro Nomura, Michio Nagashima, Kentaro Hayashi, Yu Makihara, Masato Fukunaga, Ken-Ichi Hiroshima, Masakiyo Nobuyoshi, Masahiko Goya
BACKGROUND: Data regarding long-term mortality and factors influencing appropriate therapies in Japanese patients with implantable cardioverter defibrillators (ICD), who satisfy the Multicenter Automatic Defibrillator Implantation Trial II (MADIT II) criteria for primary prevention, remain scarce. METHODS: A total of 118 consecutive patients who underwent ICD implantation without any prior ventricular arrhythmic event, from January 2000 to December 2012, were enrolled based on the MADIT II criteria: left ventricular ejection fraction (LVEF) of ≤30% with ischemic heart disease and at least 4 weeks after a myocardial infarction...
February 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28185355/catheter-ablation-of-ventricular-tachycardia-in-patients-with-mitraclip-device-preliminary-findings
#3
Laurent M Haegeli, Giuseppe D'Angelo, Nicola Trevisi, Stefano Stella, Alexander Breitenstein, Firat Duru, Corinna Brunckhorst, Paolo Della Bella
INTRODUCTION: Patients with mitral regurgitation are increasingly treated by percutaneous implantation of a MitraClip device. We investigate the feasibility and safety of the transmitral catheter route for catheter ablation of VT (ventricular tachycardia) in these patients. METHODS: The mitral valve with the MitraClip in situ was crossed under transesophageal three-dimensional echocardiographic and fluoroscopic guidance using a steerable sheath for ablation of the left ventricle...
February 10, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28167090/ablation-of-ventricular-tachycardia-in-arrhythmogenic-right-ventricular-dysplasia
#4
REVIEW
Rajeev K Pathak, Fermin C Garcia
Endocardial and epicardial electroanatomical mapping and ablation is a safe and effective therapy in the treatment of right ventricle arrhythmias occurring in the setting of arrhythmogenic right ventricular cardiomyopathy (ARVD). Careful mapping and ablation plans must be tailored for each patient based on comorbidities and ventricular tachycardia morphologies. This review focuses on the catheter ablation for ventricular arrhythmias in patients with ARVD.
March 2017: Cardiac Electrophysiology Clinics
https://www.readbyqxmd.com/read/28153106/isolated-subepicardial-right-ventricular-outflow-tract-scar-in-athletes-with-ventricular%C3%A2-tachycardia
#5
Jeroen Venlet, Sebastiaan R D Piers, Jan D H Jongbloed, Alexander F A Androulakis, Yoshihisa Naruse, Dennis W den Uijl, Gijsbert F L Kapel, Marta de Riva, J Peter van Tintelen, Daniela Q C M Barge-Schaapveld, Martin J Schalij, Katja Zeppenfeld
BACKGROUND: High-level endurance training has been associated with right ventricular pathological remodeling and ventricular tachycardia (VT). Although overlap with arrhythmogenic right ventricular cardiomyopathy (ARVC) has been suggested, the arrhythmogenic substrate for VTs in athletes is unknown. OBJECTIVES: The goal of this study was to evaluate whether electroanatomic scar patterns related to sustained VT can distinguish exercise-induced arrhythmogenic remodeling from ARVC and post-inflammatory cardiomyopathies...
February 7, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28126258/clinical-impact-of-admission-hyperglycemia-on-in-hospital-mortality-in-acute-myocardial-infarction-patients
#6
Eun Jung Kim, Myung Ho Jeong, Ju Han Kim, Tae Hoon Ahn, Ki Bae Seung, Dong Joo Oh, Hyo-Soo Kim, Hyeon Cheol Gwon, In Whan Seong, Kyung Kuk Hwang, Shung Chull Chae, Kwon-Bae Kim, Young Jo Kim, Kwang Soo Cha, Seok Kyu Oh, Jei Keon Chae
BACKGROUND: Acute hyperglycemia on admission is common in acute myocardial infarction (AMI) patients regardless of diabetic status, and is known as one of prognostic factors. However, the effect of hyperglycemia on non-diabetic patients is still on debate. METHODS: A total of 12,625 AMI patients (64.0±12.6years, 26.1% female) who were enrolled in Korea Acute Myocardial Infarction Registry-National Institute of Health between November 2011 and December 2015, were classified into 4367 diabetes (65...
January 19, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28101960/effects-of-antegrade-accessory-pathway-conduction-on-qrs-terminal-vector-in-patients-with-preexcitation-syndrome
#7
Renguang Liu, Q I Chen, Yang Chen, Yingjie Zhang, Zhaolong Xu, Gaopin Wang
BACKGROUND: Ventricle preexcitation through accessory pathway changes QRS initial vector, and manifests as delta wave on electrocardiogram (ECG). However, QRS terminal vector can also be affected. METHODS: A total of 158 patients who had single accessory pathway (AP) with antegrade conduction capacity were included and divided into two groups according to the ECG with or without delta wave. Note that 150 patients had delta wave (overt AP group) on ECG; classical preexcitation syndrome was diagnosed before radiofrequency ablation...
January 19, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28077188/point-catheter-ablation-of-macro-re-entrant-ventricular-tachycardia-in-a-patient-after-surgical-repair-for-double-outlet-right-ventricle
#8
Gaku Izumi, Hisashi Yokoshiki, Atsuhito Takeda
Catheter ablation of ventricular tachycardia is often difficult in patients after surgery for CHD. In patients with a ventricular septal defect patch, it is necessary to decide which ventricular side is appropriate for catheter ablation. In this article, we report a case of successful point catheter ablation of re-entrant ventricular tachycardia. Identification of the ventricular septal defect patch using intra-cardiac echocardiography was useful.
January 12, 2017: Cardiology in the Young
https://www.readbyqxmd.com/read/28054710/atypical-surface-ecg-complicating-the-diagnosis-of-bundle-branch-reentry-tachycardia
#9
Christopher Reithmann, Bernhard Herkommer, Thomas Remp, Michael Fiek
BACKGROUND: Typical left bundle branch block (LBBB) during ventricular tachycardia (VT) is a diagnostic criterion of bundle branch reentry tachycardia (BBRT) with activation of the right bundle in the anterograde direction. METHODS AND RESULTS: 11 patients (7 male, 60 ± 12 years) with non-ischemic cardiomyopathy (left ventricular ejection fraction 37 ± 16 %) presenting with BBRT were successfully treated by ablation of the right bundle. Among them, 5 patients had atypical surface ECGs differing from a typical left bundle branch block during the VT...
January 5, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28052545/safety-feasibility-and-effectiveness-of-first-in-human-administration-of-muscle-derived-stem-progenitor-cells-modified-with-connexin-43-gene-for-treatment-of-advanced-chronic-heart-failure
#10
Adrian Gwizdala, Natalia Rozwadowska, Tomasz Jan Kolanowski, Agnieszka Malcher, Aleksandra Cieplucha, Bartlomiej Perek, Wojciech Seniuk, Ewa Straburzynska-Migaj, Zofia Oko-Sarnowska, Witold Cholewinski, Michal Michalak, Stefan Grajek, Maciej Kurpisz
AIMS: To assess the safety and efficacy of transendocardial delivery of muscle-derived stem/progenitor cells with connexin-43 overexpression (Cx-43-MDS/PC) in advanced heart failure (HF). METHODS AND RESULTS: Thirteen subjects with advanced HF, New York Heart Association (NYHA) class II-III were enrolled and treated with targeted injection of Cx-43-MDS/PCs and then monitored for at least 6 months. Overexpression of Cx43 (Cx43+) was significantly higher in all but one subject (Cx43-)...
January 2017: European Journal of Heart Failure
https://www.readbyqxmd.com/read/28025026/hyperdynamic-right-heart-function-in-graves-hyperthyroidism-measured-by-echocardiography-normalises-on-restoration-of-euthyroidism
#11
Stephanie L Teasdale, Warrick J Inder, Michael Stowasser, Tony Stanton
BACKGROUND: Graves' hyperthyroidism commonly causes tachycardia and may result in pulmonary hypertension and high output cardiac failure. There is limited information regarding the effect of treatment on cardiac function measured using modern echocardiographic techniques. METHODS: Eight individuals with Graves' hyperthyroidism, aged 22-64 years, underwent comprehensive transthoracic echocardiography at three time points: before treatment, two weeks after commencement of carbimazole, and at six months or more when euthyroid...
November 19, 2016: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28011584/effect-of-anisotropy-on-ventricular-vulnerability-to-unidirectional-block-and-reentry-by-single-premature-stimulation-during-normal-sinus-rhythm-in-rat-heart
#12
Stefano Rossi, Andrea Buccarello, Philip R Ershler, Robert L Lux, Sergio Callegari, Domenico Corradi, Luca Carnevali, Andrea Sgoifo, Michele Miragoli, Ezio Musso, Emilio Macchi
Single high-intensity premature stimuli when applied to the ventricles during ventricular drive of an ectopic site, as in the Winfree's "pinwheel experiment", usually induce reentry arrhythmias in the normal heart, while single low-intensity stimuli barely do. Yet, ventricular arrhythmia vulnerability during normal sinus-rhythm remains largely unexplored. With a view to define the role of anisotropy on ventricular vulnerability to unidirectional conduction block and reentry, we revisited the pinwheel experiment with reduced constraints in the in situ rat heart...
December 23, 2016: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/27993910/a-38-year-old-man-with-progressive-dyspnoea-and-ventricular-tachycardia
#13
Alphonsus C Liew, Claire E Raphael, Raad Mohiaddin
CLINICAL INTRODUCTION: A previously healthy 38-year-old man presented with a 3-month history of progressive dyspnoea and ventricular tachycardia (VT). He suffered a viral illness 4 months earlier. There was no family history of cardiac disease or sudden cardiac death (SCD). ECG showed left bundle branch block (LBBB). Echocardiography revealed a dilated left ventricle with severely impaired systolic function. Coronary angiogram showed angiographically normal coronary arteries. He was diagnosed as having dilated cardiomyopathy and was referred for further assessment with cardiovascular magnetic resonance (CMR) (figure 1) and subsequently CT thorax...
December 19, 2016: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/27979912/follow-up-of-a-prospective-surgical-strategy-to-prevent-intra-atrial-reentrant-tachycardia-after-the-fontan-operation
#14
Ian H Law, Osman Alam, Edward L Bove, Richard G Ohye, David J Bradley, Sunkyung Yu, Macdonald Dick
BACKGROUND: Intra-atrial reentrant tachycardia (IART) after the Fontan operation had an early reported incidence of 10% to 35% during early and intermediate follow-up and posed substantial management challenges. METHODS AND RESULTS: To reduce the incidence of IART after the Fontan procedure, we performed a randomized, double-blind study to evaluate the impact of an incision in the right atrium joining the lateral tunnel suture line and the tricuspid valve annulus...
December 2016: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/27968777/noninvasive-epicardial-and-endocardial-electrocardiographic-imaging-of-scar-related-ventricular-tachycardia
#15
Linwei Wang, Omar A Gharbia, B Milan Horáček, John L Sapp
BACKGROUND: The majority of life-threatening ventricular tachycardias (VTs) are sustained by heterogeneous scar substrates with narrow strands of surviving tissue. An effective treatment for scar-related VT is to modify the underlying scar substrate by catheter ablation. If activation sequence and entrainment mapping can be performed during sustained VT, the exit and isthmus of the circuit can often be identified. However, with invasive catheter mapping, only monomorphic VT that is hemodynamically stable can be mapped in this manner...
November 2016: Journal of Electrocardiology
https://www.readbyqxmd.com/read/27939495/development-and-impact-of-arrhythmias-after-the-norwood-procedure-a-report-from-the-pediatric-heart-network
#16
Matthew E Oster, Shan Chen, Nicholas Dagincourt, Yaniv Bar-Cohen, Matthew Brothers, Nicole Cain, Steven D Colan, Richard J Czosek, Jamie A Decker, David G Gamboa, Salim F Idriss, Joel A Kirsh, Martin J LaPage, Richard G Ohye, Elizabeth Radojewski, Maully Shah, Eric S Silver, Anoop K Singh, Joel D Temple, John Triedman, Jonathan R Kaltman
OBJECTIVES: The study objective was to determine the predictors of new-onset arrhythmia among infants with single-ventricle anomalies during the post-Norwood hospitalization and the association of those arrhythmias with postoperative outcomes (ventilator time and length of stay) and interstage mortality. METHODS: After excluding patients with preoperative arrhythmias, we used data from the Pediatric Heart Network Single Ventricle Reconstruction Trial to identify risk factors for tachyarrhythmias (atrial fibrillation, atrial flutter, supraventricular tachycardia, junctional ectopic tachycardia, and ventricular tachycardia) and atrioventricular block (second or third degree) among 544 eligible patients...
November 16, 2016: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/27932425/scn2b-deletion-in-mice-results-in-ventricular-and-atrial-arrhythmias
#17
Yangyang Bao, B Cicero Willis, Chad R Frasier, Luis F Lopez-Santiago, Xianming Lin, Roberto Ramos-Mondragón, David S Auerbach, Chunling Chen, Zhenxun Wang, Justus Anumonwo, Héctor H Valdivia, Mario Delmar, José Jalife, Lori L Isom
BACKGROUND: Mutations in SCN2B, encoding voltage-gated sodium channel β2-subunits, are associated with human cardiac arrhythmias, including atrial fibrillation and Brugada syndrome. Because of this, we propose that β2-subunits play critical roles in the establishment or maintenance of normal cardiac electric activity in vivo. METHODS AND RESULTS: To understand the pathophysiological roles of β2 in the heart, we investigated the cardiac phenotype of Scn2b null mice...
December 2016: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/27932153/a-heartbreaking-renal-transplantation-is-norepinephrine-the-culprit-to-blame
#18
M G Vailas, S Vernadakis, K Kakavia, I Paizis, J Bokos, J Boletis, G Zavos
INTRODUCTION: Takotsubo cardiomyopathy (TCM), also known as "broken heart syndrome," "apical ballooning syndrome," and "stress-induced cardiomyopathy," was first described in Japanese patients in 1990 by Sato et al. TCM is an increasingly recognized syndrome characterized by transient and reversible systolic dysfunction of the apical and middle segments of the left ventricle. This syndrome resembles acute myocardial infarction in the absence of evident coronary artery occlusion. Herein, we present a case of a 51-year-old male who underwent his second deceased-donor renal transplantation for end-stage-renal-disease due to a work-related accident...
November 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27907904/a-new-cryoenergy-for-ventricular-tachycardia-ablation-a-proof-of-concept-study
#19
Benjamin Berte, Frédéric Sacher, Jean-Yves Wielandts, Saagar Mahida, Xavier Pillois, Rukshen Weerasooriya, Olivier Bernus, Pierre Jaïs
INTRODUCTION: Lack of transmural lesion formation during radiofrequency (RF) ablation for ventricular tachycardia (VT) is an important determinant of arrhythmia recurrence. The aim of this proof-of-concept study was to evaluate safety and efficacy of a new and more powerful cryoablation system for ventricular ablation. METHODS AND RESULTS: Five healthy female sheep (59 ± 6 kg) underwent a surgical sternotomy for epicardial and endocardial access [endocardial access via right atrial appendage and left ventricular (LV) apex]...
October 25, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/27871248/left-ventricle-remodeling-predicts-the-recurrence-of-ventricular-tachyarrhythmias-in-implantable-cardioverter-defibrillator-recipients-for-secondary-prevention
#20
Wei-Chieh Lee, Huang-Chung Chen, Yung-Lung Chen, Tzu-Hsien Tsai, Kuo-Li Pan, Yu-Sheng Lin, Mien-Cheng Chen
BACKGROUND: Implantable cardioverter defibrillator (ICD) is an effective treatment for secondary prevention of ventricular tachycardia/ventricular fibrillation (VT/VF). Left ventricular (LV) remodeling may develop before ICD implant and over time. However, it remains unclear how LV remodeling affects subsequent risk for recurrence VT/VF in ICD recipients under optimal medical therapy. METHODS: From May of 2004 to June of 2015, 144 patients received ICD implantation for secondary prevention were enrolled in this study...
November 21, 2016: BMC Cardiovascular Disorders
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