Recurrence of atrial fibrillation (AF) after catheter ablation is common, with pulmonary vein
(PV) reconnection considered the most likely cause. However, technologies such as contact …

Background High‐density (HD) mapping is increasingly used to characterize arrhythmic
substrate for ablation of atypical atrial flutters (AAFl). However, results on clinical outcomes …

Background Catheter ablation is routinely used to treat scar-related atrial tachycardia (s-AT).
Conventional ablation often involves creating anatomical “lines” that transect myocardial …

Background A novel mapping algorithm utilizing vectors and global patterns of propagation
(Coherent™, Biosense Webster) has been developed to help identify the mechanism of …

Introduction Catheter ablation for perimitral atrial tachycardia (PMAT) that persists despite
lateral mitral isthmus (LMI) ablation is challenging. The aim of this study was to identify the …

De novo atypical flutters (ie, non cavotricuspid isthmus dependent) are those that occur in
the absence of prior cardiac ablation or surgery. These flutters often involve idiopathic atrial …

The emergence of novel multipolar catheters [1] designed for high definition (HD)
electroanatomical mapping systems has dramatically increased the number of electrograms …

Background Additional linear ablation for persistent atrial fibrillation (PerAF) still has limited
evidence-based medical proof. Objectives We probed into the mechanisms of intermediate …

Background Ablation of atrial arrhythmias in patients with congenital heart disease (CHD)
has markedly improved with advanced mapping systems. However, recurrence rates remain …

Pulmonary vein (PV) isolation (PVI) ablation as the first-line therapy for atrial fibrillation (AF)
and repeat PVIs for patients who had symptomatic improvement with the index PVI but who …