Mitral isthmus block is associated with favorable outcomes after reablation for long-standing persistent atrial fibrillation.

ABSTRACT:

Background

Mitral isthmus (MI) ablation was limited due to technical challenges in the index ablation for long-standing persistent atrial fibrillation (LPeAF). The role of adjunctive MI ablation was controversial.

Hypothesis

MI block could be achieved in most patients undergoing repeat LPeAF ablation and was associated with favorable clinical outcomes.

Methods

Of 87 consecutively patients undergoing reablation for recurrent atrial tachyarrhythmias (ATa), 41 patients with residual MI conduction but without pulmonary vein reconnection or left atrial roof conduction were enrolled to treat recurrent atrial flutter (AFL) (n = 20) and AF (n = 21). After AFL ablation and AF cardioversion, MI conduction gaps (CGs) were mapped and closed.

Results

MI line was successfull

SUBMITTER: Wang XH 

PROVIDER: S-EPMC7533998 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature