Strategy for repeat procedures in patients with persistent atrial fibrillation: Systematic linear ablation with adjunctive ethanol infusion into the vein of Marshall versus electrophysiology-guided ablation.

Introduction: The optimal strategy after a failed ablation for persistent atrial fibrillation (perAF) is unknown. This study evaluated the value of an anatomically guided strategy using a systematic set of linear lesions with adjunctive ethanol infusion into the vein of Marshall (Et-VOM) in patients referred for second perAF ablation procedures.

Methods And Results: Patients with perAF who underwent a second procedure were grouped according to the two strategies.

Local abnormal ventricular activity detection in scar-related VT: Microelectrode versus conventional bipolar electrode.

Background: Conventional bipolar electrodes (CBE) may be suboptimal to detect local abnormal ventricular activities (LAVAs). Microelectrodes (ME) may improve the detection of LAVAs. This study sought to elucidate the detectability of LAVAs using ME compared with CBE in patients with scar-related ventricular tachycardia (VT).

Conduction recovery with Wenckebach periodicity at the mitral isthmus.

A Wenckebach periodicity at the mitral isthmus (MI) lesion has rarely been reported. We described a case presenting conduction recovery with Wenckebach periodicity at the posterior MI lesion after achieving the MI block. These findings demonstrate a pseudo MI block with Wenckebach periodicity owing to the pacing rate.