The characteristics and efficacy of catheter ablation of focal atrial tachycardia arising from an epicardial site.

ABSTRACT:

Background

Although epicardial structures around the atrium such as adipose tissue possess arrhythmogenicity, little is known about atrial tachycardias (ATs) originating from epicardial sites (Epi-ATs). This study aimed to elucidate the prevalence, characteristics, and outcome after radiofrequency catheter ablation (RFCA) of Epi-ATs and to reveal the association between Epi-ATs and the epicardial structures.

Methods

The electrocardiographic, electrophysiologic, and anatomical properties and results of RFCA were analyzed in 42 patients with a total of 49 ectopic ATs.

Results

Six Epi-ATs (12%) were observed in six patients (14%). Four of six were respiratory cycle-dependent ATs and one was a swallowing-induced AT. The Epi-AT origins were adjacent to a pulmonary vein (fi

SUBMITTER: Yamamoto T 

PROVIDER: S-EPMC8027578 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature