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Idiopathic ventricular fibrillation

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https://www.readbyqxmd.com/read/29678335/arrhythmic-risk-stratification-in-patients-with-idiopathic-dilated-cardiomyopathy
#1
Davide Stolfo, Nicole Ceschia, Massimo Zecchin, Antonio De Luca, Marco Gobbo, Giulia Barbati, Marta Gigli, Marco Masè, Bruno Pinamonti, Alberto Pivetta, Marco Merlo, Gianfranco Sinagra
Arrhythmic risk stratification in idiopathic dilated cardiomyopathy (IDC) remains a major concern. As the ventricles remodel in time, risk factors for arrhythmic death may change. A cohort of 710 patients with idiopathic dilated cardiomyopathy, without previous ventricular arrhythmias, was retrospectively studied to understand how risks vary in time. The primary end point was a composite of sudden cardiac death, ventricular fibrillation, sustained ventricular tachycardia, and appropriate implantable cardioverter-defibrillator interventions...
March 14, 2018: American Journal of Cardiology
https://www.readbyqxmd.com/read/29657596/high-defibrillation-threshold-with-a-subcutaneous-implantable-cardiac-defibrillator-due-to-the-lead-having-been-positioned-in-the-fat-layer
#2
Tatsuhiko Hirao, Junichi Nitta, Akira Sato, Yoshihide Takahashi, Masahiko Goya, Kenzo Hirao
A 46-year-old female with a body mass index of 38.9 kg/m2 and no organic heart disease underwent a subcutaneous implantable cardioverter-defibrillator implantation for secondary prevention of sudden cardiac death in the setting of idiopathic ventricular fibrillation. Defibrillation threshold (DFT) testing during implantation detected high shock impedance and high DFT. Fluoroscopy revealed subcoil fat between the lead and the sternum, which we suspected was the reason for the high shock impedance and high DFT...
April 2018: Journal of Arrhythmia
https://www.readbyqxmd.com/read/29600967/ventricular-fibrillation-induced-by-radiofrequency-energy-delivery-for-premature-ventricular-contractions-arising-from-the-right-ventricular-outflow-tract-is-implantablecardioverterdefibrillator-indicated
#3
Michał Orczykowski, Paweł Derejko, Piotr Urbanek, Robert Bodalski, Radosław Lenarczyk, Dariusz Kozłowski, Edward Koźluk, Damian Łasocha, Maciej Sterliński, Zbigniew Kalarus, Maria Bilińska, Łukasz Szumowski
INTRODUCTION    Inadvertently induced ventricular fibrillation (VF) by radiofrequency (RF) energy delivery for premature ventricular complexes (PVCs) is a rare phenomenon; nevertheless, it is crucial to assess long‑term risk of sudden cardiac death in these patients. OBJECTIVES    The aim of our study was to define the long‑term prognosis in patients with normal ejection fraction (EF), in whom VF was inadvertently induced by RF energy application during ablation of symptomatic idiopathic PVCs originating from the right ventricular outflow tract (RVOT)...
March 29, 2018: Polish Archives of Internal Medicine
https://www.readbyqxmd.com/read/29600790/biatrial-electrical-and-structural-atrial-changes-in-heart-failure-electroanatomic-mapping-in-persistent-atrial-fibrillation-in-humans
#4
Sandeep Prabhu, Aleksandr Voskoboinik, Alex J A McLellan, Kah Y Peck, Bhupesh Pathik, Chrishan J Nalliah, Geoff R Wong, Sonia M Azzopardi, Geoffrey Lee, Justin Mariani, Liang-Han Ling, Andrew J Taylor, Jonathan M Kalman, Peter M Kistler
OBJECTIVES: This study sought to characterize the biatrial substrate in heart failure (HF) and persistent atrial fibrillation (PeAF). BACKGROUND: Atrial fibrillation (AF) and HF frequently coexist; however, the contribution of HF to the biatrial substrate in PeAF is unclear. METHODS: Consecutive patients with PeAF and normal left ventricular (NLV) systolic function (left ventricular ejection fraction [LVEF] >55%) or idiopathic cardiomyopathy (LVEF ≤45%) undergoing AF ablation were enrolled...
January 2018: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29566157/characteristics-and-clinical-assessment-of-unexplained-sudden-cardiac-arrest-in-the-real-world-setting-focus-on-idiopathic-ventricular-fibrillation
#5
Victor Waldmann, Wulfran Bougouin, Nicole Karam, Florence Dumas, Ardalan Sharifzadehgan, Estelle Gandjbakhch, Vincent Algalarrondo, Kumar Narayanan, Alexandre Zhao, Denis Amet, Daniel Jost, Guillaume Geri, Lionel Lamhaut, Frankie Beganton, Bertrand Ludes, Patrick Bruneval, Isabelle Plu, Françoise Hidden-Lucet, Juliette Albuisson, Thomas Lavergne, Olivier Piot, Christine Alonso, Antoine Leenhardt, Nicolas Lellouche, Fabrice Extramiana, Alain Cariou, Xavier Jouven, Eloi Marijon
Aims: Recent studies have shown that in more than half of apparently unexplained sudden cardiac arrests (SCA), a specific aetiology can be unmasked by a careful evaluation. The characteristics and the extent to which such cases undergo a systematic thorough investigation in real-life practice are unknown. Methods and results: Data were analysed from an ongoing study, collecting all cases of out-of-hospital cardiac arrest in Paris area. Investigations performed during the index hospitalization or planned after discharge were gathered to evaluate the completeness of assessment of unexplained SCA...
March 16, 2018: European Heart Journal
https://www.readbyqxmd.com/read/29474731/a-novel-mutation-of-dipeptidyl-aminopeptidase-like-protein-6-in-a-family-with-suspicious-idiopathic-ventricular-fibrillation
#6
Dong-Bo Ding, Liang-Liang Fan, Zhen Xiao, Hao Huang, Ya-Qin Chen, Shuai Guo, Zhong-Hua Liu, Rong Xiang
Background: Sudden cardiac death (SCD) occurs in a broad spectrum of cardiac pathologies and is an important cause of mortality in the general population. Idiopathic ventricular fibrillation (IVF) is a rare but important factor resulting in SCD. It is diagnosed in a resuscitated cardiac arrest victim underlying unknown cause, with documented ventricular fibrillation. Previous studies have demonstrated that mutations in dipeptidyl aminopeptidase-like protein-6 (DPP6) and cardiac sodium channel Nav1...
February 20, 2018: QJM: Monthly Journal of the Association of Physicians
https://www.readbyqxmd.com/read/29450695/a-clinical-approach-to-arrhythmias-revisited-in-2018-from-ecg-over-noninvasive-and-invasive-electrophysiology-to-advanced-imaging
#7
REVIEW
L Jordaens
Understanding arrhythmias and their treatment is not always easy. The current straightforward approach with catheter ablation and device therapy is an amazing achievement, but does not make management of underlying or other cardiac disease and pharmacological therapy unnecessary. The goal of this paper is to describe how much of the knowledge of the 1980s and early 1990s can and should still be applied in the modern treatment of patients with arrhythmias. After an introduction, this review will focus on paroxysmal atrial fibrillation and a prototype of 'idiopathic' ventricular arrhythmias, two diseases with a striking similarity, and will discuss the arrhythmogenesis...
February 15, 2018: Netherlands Heart Journal
https://www.readbyqxmd.com/read/29436392/significance-of-coronary-artery-spasm-diagnosis-in-patients-with-early-repolarization-syndrome
#8
Tsukasa Kamakura, Mitsuru Wada, Kohei Ishibashi, Yuko Y Inoue, Koji Miyamoto, Hideo Okamura, Satoshi Nagase, Takashi Noda, Takeshi Aiba, Satoshi Yasuda, Wataru Shimizu, Shiro Kamakura, Kengo Kusano
BACKGROUND: Previously described patients with early repolarization syndrome (ERS) may have experienced silent coronary artery spasm (CAS) because the diagnosis of CAS was mainly based on symptoms or coronary angiography findings, without performing a spasm provocation test. This study investigated the significance of CAS diagnosis and evaluated the incidence of silent CAS in patients with possible ERS (ie, idiopathic ventricular fibrillation [VF] and inferolateral J wave). METHODS AND RESULTS: The study included 34 patients with idiopathic VF and inferolateral J wave...
February 7, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29237243/exercise-related-severe-cardiac-events
#9
L Vicent, A Ariza-Solé, J R González-Juanatey, A Uribarri, J Ortiz, E López de Sá, J Sans-Roselló, C T Querol, P Codina, I Sousa-Casasnovas, M Martínez-Sellés
Physical activity has benefits on health. However, there is a small risk of effort-related adverse events. The aim of this study is to describe exercise-related severe cardiovascular events and to relate them with the type of sport performed. We performed a ten-year retrospective study in eight Spanish cardiac intensive care units. Adverse cardiac events were defined as acute myocardial infarction, cardiac arrest or syncope related to physical activity. From 117 patients included, 109 were male (93.2%), and mean age was 51...
April 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29153107/interictal-cardiac-autonomic-nervous-system-disturbances-in-dogs-with-idiopathic-epilepsy
#10
M Musteata, D Mocanu, G D Stanciu, M Armasu, G Solcan
Autonomic nervous system (ANS) activity in the interictal period (InIp) in dogs with presumed idiopathic epilepsy (pIE) was assessed using heart rate variability (HRV) analysis. The HRVs obtained from 28 pIE dogs with interictal epileptic discharges (InIEd; 11 with treatment and 17 without treatment) detected on electroencephalography (EEG) were compared with those obtained from 13 healthy dogs. On electrocardiographic (ECG) study, the P wave dispersion (PWD; P<0.001), P max (P=0.004) and corrected QT interval (QTc; P=0...
October 2017: Veterinary Journal
https://www.readbyqxmd.com/read/29090492/late-potentials-and-their-correlation-with-ventricular-structure-in-patients-with-ventricular-arrhythmias
#11
Peter Marstrand, Anna Axelsson, Jens Jakob Thune, Niels Vejlstrup, Steen Pehrson, Henning Bundgaard, Juliane Theilade
INTRODUCTION: The presence of late potentials (LP) may indicate a predisposition to ventricular arrhythmias and sudden cardiac death. We investigated the association between presence of LP and structural cardiac anomalies assessed by magnetic resonance (CMR) in patients presenting with ventricular arrhythmias. METHODS: We included 42 patients admitted with ventricular tachycardia or fibrillation who had undergone both signal-averaged ECG recording and CMR imaging...
December 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29067911/syncope-in-a-young-man-role-of-purkinje-fibres-in-idiopathic-ventricular-fibrillation
#12
Claire A Martin, Laurence Nunn, Pier D Lambiase
A young man suffered cardiac arrests with polymorphic ventricular tachycardia (PVT) and ventricular fibrillation (VF) triggered by ventricular premature contractions (PVCs). The arrhythmia was resistant to anti-arrhythmics, so after ICD implantation he underwent successful ablation of the triggering VE beat, which was pace-mapped to the left posterior hemi-fascicle. We review the evidence for the role of the Purkinje network in the initiation and maintenance of PVT and VF, postulating a channelopathy as a possible underlying cause, and provide recommendations for PVC ablation...
July 2017: Indian Pacing and Electrophysiology Journal
https://www.readbyqxmd.com/read/29042423/low-prevalence-of-inappropriate-shocks-in-patients-with-inherited-arrhythmia-syndromes-with-the-subcutaneous-implantable-defibrillator-single-center-experience-and-long-term-follow-up
#13
Boris Rudic, Erol Tülümen, Veronika Berlin, Susanne Röger, Ksenija Stach, Volker Liebe, Ibrahim El-Battrawy, Christina Dösch, Theano Papavassiliu, Ibrahim Akin, Martin Borggrefe, Jürgen Kuschyk
BACKGROUND: Up to 40% of patients with transvenous implantable cardioverter-defibrillator (ICD) experience lead-associated complications and may suffer from high complication rates when lead extraction is indicated. Subcutaneous ICD may represent a feasible alternative; however, the efficacy of the subcutaneous ICD in the detection and treatment of ventricular arrhythmias in patients with hereditary arrhythmia syndromes has not been fully evaluated. METHODS AND RESULTS: Patients with primary hereditary arrhythmia syndromes who fulfilled indication for defibrillator placement were eligible for enrollment...
October 17, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29032884/the-genetics-underlying-idiopathic-ventricular-fibrillation-a-special-role-for-catecholaminergic-polymorphic-ventricular-tachycardia
#14
Jaakko T Leinonen, Lia Crotti, Aurora Djupsjöbacka, Silvia Castelletti, Nella Junna, Alice Ghidoni, Annukka M Tuiskula, Carla Spazzolini, Federica Dagradi, Matti Viitasalo, Kimmo Kontula, Maria-Christina Kotta, Elisabeth Widén, Heikki Swan, Peter J Schwartz
BACKGROUND: Ventricular fibrillation (VF) is a major cause of sudden cardiac death. In some cases clinical investigations fail to identify the underlying cause and the event is classified as idiopathic (IVF). Since mutations in arrhythmia-associated genes frequently determine arrhythmia susceptibility, screening for disease-predisposing variants could improve IVF diagnostics. METHODS AND RESULTS: The study included 76 Finnish and Italian patients with a mean age of 31...
October 5, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/29016800/the-prognostic-impact-of-single-extra-stimulus-on-programmed-ventricular-stimulation-in-brugada-patients-without-previous-cardiac-arrest-multi-centre-study-in-japan
#15
Masahiko Takagi, Yukio Sekiguchi, Yasuhiro Yokoyama, Naohiko Aihara, Masayasu Hiraoka, Kazutaka Aonuma
Aims: The prognostic value of programmed electrical stimulation (PES) in Brugada syndrome (BrS) remains controversial. One of the reasons for discrepant results may be due to the selection of stimulation protocol. We evaluated the prognostic value of a positive PES result (PES+) according to the inducible pacing sites and the number of extra-stimuli in BrS patients without previous cardiac arrest (CA). Methods and results: We enrolled 224 consecutive BrS patients without previous CA (mean age 51 ± 14 years, 209 males), who underwent PES with the identical protocol...
June 16, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28978409/specific-indications-and-clinical-outcome-in-patients-with-subcutaneous-icd-a-nationwide-multicentre-registry
#16
Michael Sponder, Cesar Khazen, Wolfgang Dichtl, Lukas Fiedler, Deddo Mörtl, Alexander Teubl, Clemens Steinwender, Martin Martinek, Michael Nürnberg, Daniel Dalos, Johannes Kastner, Christoph Schukro
BACKGROUND: Subcutaneous implantable cardioverter-defibrillators (S-ICD) are an innovative and less invasive alternative to transvenous ICD (TV-ICD) in selected patients. We aimed to investigate the underlying diseases and the specific indications for implanting S-ICD in clinical practice, as well as the prevalence of shock delivery and complications. METHODS AND RESULTS: From December 2012, data of 236 patients (30,5% female; age 48,6±16,8years) were gathered from 12 centres in Austria...
October 1, 2017: European Journal of Internal Medicine
https://www.readbyqxmd.com/read/28948148/different-rate-dependent-responses-between-j-waves-and-the-notches-on-an-epicardial-local-electrogram-in-a-patient-with-idiopathic-ventricular-fibrillation
#17
Yosuke Kamikubo, Yasuya Inden, Tomoyuki Nagao, Yoshifusa Aizawa, Toyoaki Murohara
No abstract text is available yet for this article.
September 2017: HeartRhythm Case Reports
https://www.readbyqxmd.com/read/28886389/localized-constrictive-pericarditis-compressing-and-obstructing-the-right-ventricular-inflow-tract-due-to-a-giant-anterior-calcified-cardiac-mass-a-case-report
#18
Klodian Krakulli, Edvin Prifti, Hortensa Gjergo, Endri Hasimi
INTRODUCTION: Localized pericardial constriction is a rare form of constrictive pericarditis CP. Depending on the CP location, clinical presentation may be variable, including compression and obstruction of right ventricular inflow tract(RVIT), coronary obstruction, or pulmonary stenosis. CASE PRESENTATION: A 72-year-old man presented a 2-year history of dyspnea and atrial fibrillation. A contrast enhanced angio computerized tomography clearly demonstrated a large spherical mass about 11×9×4cm in the anterior pericardium, presenting as a mediastinal tumor causing compression and obstruction of the RVIT...
2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28855115/catheter-ablation-versus-medical-rate-control-in-atrial-fibrillation-and-systolic-dysfunction-the-camera-mri-study
#19
RANDOMIZED CONTROLLED TRIAL
Sandeep Prabhu, Andrew J Taylor, Ben T Costello, David M Kaye, Alex J A McLellan, Aleksandr Voskoboinik, Hariharan Sugumar, Siobhan M Lockwood, Michael B Stokes, Bhupesh Pathik, Chrishan J Nalliah, Geoff R Wong, Sonia M Azzopardi, Sarah J Gutman, Geoffrey Lee, Jamie Layland, Justin A Mariani, Liang-Han Ling, Jonathan M Kalman, Peter M Kistler
BACKGROUND: Atrial fibrillation (AF) and left ventricular systolic dysfunction (LVSD) frequently co-exist despite adequate rate control. Existing randomized studies of AF and LVSD of varying etiologies have reported modest benefits with a rhythm control strategy. OBJECTIVES: The goal of this study was to determine whether catheter ablation (CA) for AF could improve LVSD compared with medical rate control (MRC) where the etiology of the LVSD was unexplained, apart from the presence of AF...
October 17, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28736713/a-subtype-of-idiopathic-ventricular-fibrillation-and-its-relevance-to-catheter-ablation-and-genetic-variants
#20
Takahiko Nishiyama, Yoshiyasu Aizawa, Shogo Ito, Yoshinori Katsumata, Takehiro Kimura, Seiji Takatsuki
No abstract text is available yet for this article.
May 2017: HeartRhythm Case Reports
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