Ventricular arrhythmias are an important cause of morbidity and mortality and come in a
variety of forms, from single premature ventricular complexes to sustained ventricular …

Abbreviations: 3D, three-dimensional; AF, atrial fibrillation; AP, accessory pathway; ARVC,
arrhythmogenic right ventricular cardiomyopathy; AT, atrial tachycardia; AVB, atrioventricular …

Objectives: This study sought to characterize the histopathological features of
radiofrequency ablation (RFA) in heterogeneous ventricular scar in comparison to those in …

Objectives: This study sought to evaluate an investigational catheter that incorporates 3
microelectrodes embedded along the circumference of a standard 3.5-mm open-irrigated …

Background: The accuracy of ECG imaging (ECGI) in structural heart disease remains
uncertain. This study aimed to provide a detailed comparison of ECGI and contact-mapping …

Background Epicardial mapping and ablation are frequently necessary to eliminate
ventricular tachycardia (VT) in patients with Chagas disease. Nonetheless, there are no …

Background Late gadolinium enhancement (LGE) is the current standard for myocardial scar
delineation. In this study, we introduce the tractographic propagation angle (PA), a metric of …

Aims Ventricular tachycardia (VT) substrate ablation is based on detailed electroanatomical
maps (EAM). This study analyses whether high-density multielectrode mapping (MEM) is …

Accurate substrate characterisation may improve the evolving understanding and treatment
of cardiac arrhythmias. During substrate-based ablation techniques, wide practice variations …

Background—The activation pattern of localized reentry (LR) in atrial tachycardia remains
incompletely understood. We used the ultra–high density Rhythmia mapping system to study …