Pause-dependent mitral isthmus conduction block during ablation of the mitral isthmus: What is the mechanism?

Tsukasa Kamakura; Remi Chauvel; Josselin Duchateau; Nicolas Derval; Thomas Pambrun

doi:10.1111/jce.14819

Pause-dependent mitral isthmus conduction block during ablation of the mitral isthmus: What is the mechanism?

J Cardiovasc Electrophysiol. 2021 Jan;32(1):162-165. doi: 10.1111/jce.14819. Epub 2020 Nov 25.

Authors

Tsukasa Kamakura¹, Remi Chauvel¹, Josselin Duchateau¹, Nicolas Derval¹, Thomas Pambrun¹

Affiliation

¹ Department of Cardiac Pacing and Electrophysiology, IHC, Liryc, Electrophysiology and Heart modeling Institute, Bordeaux University Hospital (CHU), University of Bordeaux, Pessac-Bordeaux, France.

PMID: 33206428
DOI: 10.1111/jce.14819

Abstract

Mitral isthmus (MI) ablation is commonly performed as an adjunct therapy to pulmonary isolation during the treatment for persistent atrial fibrillation. Confirmation of complete MI block is essential because an incomplete MI block may result in iatrogenic atrial tachycardia. However, there are several pitfalls in the diagnosis of an MI line block. We herein report a case of transient pause-dependent MI block during MI ablation.

Keywords: ablation; atrial fibrillation; liner line ablation; mitral isthmus; pause-dependent block.

Publication types

Case Reports
Research Support, Non-U.S. Gov't

MeSH terms

Atrial Fibrillation* / diagnosis
Atrial Fibrillation* / surgery
Catheter Ablation* / adverse effects
Heart Rate
Humans
Mitral Valve / diagnostic imaging
Mitral Valve / surgery
Tachycardia, Supraventricular* / diagnosis
Tachycardia, Supraventricular* / etiology
Tachycardia, Supraventricular* / surgery
Treatment Outcome