Left Atrial Volume Index Predicts Arrhythmia-Free Survival in Patients with Persistent Atrial Fibrillation Undergoing Cryoballoon Ablation.

Background: Pulmonary vein isolation (PVI) using cryoballoon ablation (PVI-C) is increasingly performed as a first-line strategy for the treatment of patients with persistent atrial fibrillation (PersAF); however, follow-up data and predictors of procedural success are lacking.

Objective: To study the efficacy of PVI-C in patients with PersAF, focusing on predictors of procedural success.

Methods: By retrospective review, 148 consecutive patients with PersAF who underwent PVI-C were analyzed.

Safety of anticoagulation with uninterrupted warfarin vs. interrupted dabigatran in patients requiring an implantable cardiac device.

Background: The optimal strategy of peri-procedural anticoagulation in patients undergoing permanent cardiac device implantation is controversial. Our objective was to compare the major bleeding and thromboembolic complications in patients managed with uninterrupted warfarin (UW) vs. interrupted dabigatran (ID) during permanent pacemaker (PPM) or implantable cardioverter defibrillators (ICD) implantation.

Cardiac perforation and lead dislodgement after implantation of a MR-conditional pacing lead: a single-center experience.

Objective: The purpose of our study was to determine if the rate of lead-related complications was increased with the Medtronic CapSureFix MRI™ SureScan™ 5086 MRI pacing lead (5086; Medtronic Inc., Minneapolis, MN, USA) compared to the previous generation of Medtronic CapSureFix Novus™ 5076 pacing lead (5076).

Background: The 5086 lead is a newly introduced active-fixation pacemaker lead designed to be used conditionally in a magnetic resonance (MR) scanner.

Syncope and recurrent ventricular tachycardia with a newly identified desmosomal gene mutation.

Ventricular arrhythmias in young people most commonly occur due to the presence of hypertrophic cardiomyopathy, long QT syndrome or Wolff-Parkinson-White syndrome. We present a case in which the patient had exercise induced syncopal spells and was found to have ventricular tachycardia (VT) during both exercise stress testing and an electrophysiology study. Further genetic studies showed a previously unseen desmosomal gene mutation confirming the presence of Arrhythmogenic Right Ventricular Cardiomyopathy (ARVC).

Does microvolt T-wave alternans testing predict ventricular tachyarrhythmias in patients with ischemic cardiomyopathy and prophylactic defibrillators? The MASTER (Microvolt T Wave Alternans Testing for Risk Stratification of Post-Myocardial Infarction Patients) trial.

Objectives: The purpose of this trial was to determine whether microvolt T-wave alternans (MTWA) predicts ventricular tachyarrhythmic events (VTEs) in post-myocardial infarction patients with left ventricular ejection fraction (LVEF) < or =30%.

Background: Previous studies have established MTWA as a predictor for total and arrhythmic mortality, but its ability to identify prophylactic implantable cardioverter-defibrillator (ICD) recipients most likely to experience VTEs remains uncertain.

Methods: This prospective trial was conducted at 50 U.