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ventricle tachycardia

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https://www.readbyqxmd.com/read/28330969/influence-of-the-coronary-circulation-on-thermal-tolerance-and-cardiac-performance-during-warming-in-rainbow-trout
#1
Andreas Ekström, Michael Axelsson, Albin Gräns, Jeroen Brijs, Erik Sandblom
Thermal tolerance in fish may be related to an oxygen limitation of cardiac function. While the hearts of some fish species receive oxygenated blood via a coronary circulation, the influence of this oxygen supply on thermal tolerance and cardiac performance during warming remain unexplored. Here, we analyzed the effect in vivo of acute warming on coronary blood flow in adult sexually mature rainbow trout (Onchorhynchus mykiss), and the consequences of chronic coronary ligation on cardiac function and thermal tolerance in juvenile trout...
February 22, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28329164/large-animal-model-of-functional-tricuspid-regurgitation-in-pacing-induced-end-stage-heart-failure
#2
Marcin Malinowski, Alistair G Proudfoot, David Langholz, Lenora Eberhart, Michael Brown, Hans Schubert, Jeremy Wodarek, Tomasz A Timek
OBJECTIVES: Functional tricuspid regurgitation (FTR) is common in patients with advanced heart failure and frequently complicates left ventricular assist device implantation yet remains poorly understood. We set out to establish large animal model of FTR that could serve as a research platform to investigate the pathogenesis of FTR associated with end-stage heart failure. METHODS: : Through right thoracotomy, ten adult sheep underwent implantation of pacemaker with epicardial LV lead, five sonomicrometry crystals on the right ventricle, and left and right ventricular telemetry pressure sensors during a beating heart off-pump procedure...
February 21, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28328585/mechanical-support-with-impella-during-malignant-arrhythmia-ablation-a-case-report-on-the-growing-trend-in-the-electrophysiology-laboratory
#3
Adam C Adler, Ramesh Kodavatiganti
Congenitally corrected transposition of the great arteries is a rare form of congenital heart disease in which the persistence of the right ventricle as the systemic ventricle leads to heart failure, tricuspid valve insufficiency, and arrhythmia. Supraventricular arrhythmias are especially common in these patients. We discuss the anesthetic management of a 33-year-old patient with congenitally corrected transposition of the great arteries who required a ventricular assist device to maintain cardiac output during ablation of supraventricular tachyarrythmia...
March 17, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/28316327/obstructive-primary-cardiac-t-cell-lymphoma-a-case-report-from-senegal
#4
Simon Antoine Sarr, Abdou Majib Gaye, Fatou Aw, Jean de Dieu Nzambaza, Malick Bodian, Kana Babaka, Mouhamadou Bamba Ndiaye, Adama Kane, Maboury Diao, Serigne Abdou Ba
BACKGROUND Cardiac lymphoma is a rare entity, defined by the non-extra cardiac location at diagnosis. CASE REPORT Our patient was a 32-year-old female with no particular medical history, who presented with right heart failure with recurrent ascites and pleural effusion. There was a progressive worsening exertional dyspnea. On admission, examination revealed an irregular tachycardia at 170 beats per minute (bpm) and congestive heart failure. The electrocardiogram scored full tachyarrhythmia by atrial fibrillation with an average ventricular rate of 179 cycles per minute...
March 20, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28316073/arrhythmic-effects-of-epac-mediated-ryanodine-receptor-activation-in-langendorff-perfused-murine-hearts-are-associated-with-reduced-conduction-velocity
#5
Mengye Li, Sandeep Hothi, Samantha C Salvage, Kamalan Jeevaratnam, Andrew A Grace, Christopher L-H Huang
Recent papers have attributed arrhythmic substrate in murine RyR2-P2328S hearts to reduced action potential (AP) conduction velocities (CV), reflecting acute functional inhibition and/or reduced expression of sodium channels. We explored for acute effects of direct Epac (exchange protein directly activated by cAMP)-mediated ryanodine receptor-2 (RyR2) activation on arrhythmic substrate and CV. Monophasic action potential recordings demonstrated that initial steady (8-Hz) extrinsic pacing elicited ventricular tachycardia (VT) in 0 of 18 Langendorff-perfused wild-type mouse ventricles before pharmacological intervention...
March 18, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28294853/-interrelation-of-electrophysiological-and-perfusion-changes-in-patients-with-left-ventricular-aneurysm
#6
V E Babokin, V M Shipulin, S M Minin, R E Batalov, S S Gutor, U B Lishmanov, S V Popov, V N Ilyinov, S L Andreev, R S Karpov
The study was aimed at identification of relations between perfusion and electrophysiological changes in left ventricular (LV) myocardium in patients with ischemic heart disease (IHD) with postinfarction LV aneurysm and ventricular tachycardia. The study enrolled 23 patients with the aforementioned disease. Preoperatively, apart from standard clinical examination of cardiosurgical patients, intracardiac electrophysiological study and perfusion single-photon emission computed tomography of myocardium with 99mTc-Technetril were performed...
April 2016: Kardiologiia
https://www.readbyqxmd.com/read/28288337/remodelling-of-myocardial-intercalated-disc-protein-connexin-43-causes-increased-susceptibility-to-malignant-arrhythmias-in-arvc-d-patients
#7
Xiao Chen, Liang Chen, Zhenglian Chen, Xinshan Chen, Jiangping Song
BACKGROUND: Arrhythmogenic right ventricular cardiomyopathy/dysplasia (ARVC/D) is a primary cardiomyopathy characterised by fibrofatty replacement and ventricular arrhythmias. The occurrence of malignant arrhythmias may be associated with fatty infiltration and intercalated disk remodelling, but the specific pathological remodelling pattern is not yet clear. METHODS: Twelve explanted hearts from patients diagnosed with ARVC/D according to the 2010 Task Force Criteria and pathology examination were divided into two groups with (SVT, n=6) or without (non-SVT, n=6) recurrent sustained ventricular tachycardia (SVT) before heart transplantation...
February 27, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28284496/qrs-duration-and-dispersion-for-predicting-ventricular-arrhythmias-in-early-stage-of-acute-myocardial-infraction
#8
E Chávez-González, A E Rodríguez Jiménez, F L Moreno-Martínez
OBJECTIVE: To determine the relationship between QRS duration and dispersion and the occurrence of ventricular arrhythmias in early stages of acute myocardial infarction (AMI). DESIGN: A retrospective, longitudinal descriptive study was carried out. SETTING: Hospital General Universitario "Camilo Cienfuegos", Sancti Spíritus, Cuba. Secondary health care. PATIENTS OR PARTICIPANTS: A total of 209 patients diagnosed with ST-segment elevation AMI from January 2012 to June 2014...
March 8, 2017: Medicina Intensiva
https://www.readbyqxmd.com/read/28265215/nonfluoroscopic-imaging-as-guidance-for-radiofrequency-ablation-of-atrioventricular-nodal-reentrant-tachycardia-after-mustard-repair
#9
Jan Hluchy, Dinh Q Nguyen, Henrik Sobczak, Bodo Brandts
Most tachycardias in the pulmonary venous atrium are inaccessible by direct means and require either a retrograde approach or a transseptal approach for ablation. We present a case in which successful radiofrequency ablation of common atrioventricular nodal reentrant tachycardia was accomplished via a retrograde transaortic approach guided by nonfluoroscopic mapping with use of the NavX(™) mapping system. The patient was a 49-year-old woman who at the age of 4 years had undergone Mustard repair for complete dextrotransposition of the great arteries...
February 2017: Texas Heart Institute Journal
https://www.readbyqxmd.com/read/28240657/usefulness-of-18-f-fdg-pet-associated-with-a-high-fat-low-carbohydrate-preparation-for-the-detection-of-a-myocardial-embedded-metastasis
#10
Loïc Djaileb, Damien Mandry, Laurent Riou, Pierre-Yves Marie, Antoine Verger
The detection of left ventricle metastases is highly relevant because of the risk of severe adverse outcomes such as ventricular arrhythmia. We report herein the case of a 68-year-old man who presented with a ventricular tachycardia due to a myocardial metastasis from a renal cell carcinoma. The metastasis was embedded within the left ventricular lateral wall. It was identified on the basis of persistent F-FDG focal uptake following the ingestion of a high-fat, low-carbohydrate preparation.
February 24, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28236155/cardiac-magnetic-resonance-imaging-and-electroanatomic-voltage-discordance-in-non-ischemic-left-ventricle-ventricular-tachycardia-and-premature-ventricular-depolarizations
#11
Brian P Betensky, Wei Dong, Benjamin A D'Souza, Erica S Zado, Yuchi Han, Francis E Marchlinski
PURPOSE: Magnetic resonance imaging (MRI) with late gadolinium enhancement is commonly performed in patients with non-ischemic LV ventricular tachycardia/ventricular premature depolarizations (non-ischemic LV-VT/VPDs) to define VT substrate prior to catheter ablation. We investigated the prevalence of abnormal voltage and VT localized to areas of the myocardium not reported to have late gadolinium enhancement (LGE) on routine pre-procedural MRI and sought to determine if quantitative MRI analysis could reduce this discordance...
February 24, 2017: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/28219755/a-congenital-diverticulum-of-the-left-ventricular-apex-manifested-by-stroke-and-recurrent-ventricular-tachycardia
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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...
March 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
#19
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
#20
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: Eleven patients (seven male, 60 ± 12 years) with nonischemic cardiomyopathy (left ventricular ejection fraction 37 ± 16%) presenting with BBRT were successfully treated by ablation of the right bundle. Among them, five patients had atypical surface electrocardiograms (ECGs) differing from a typical LBBB during the VT...
February 2017: Pacing and Clinical Electrophysiology: PACE
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