Defibrillation Threshold of Internal Cardioversion Prior to Ablation Predicts Atrial Fibrillation Recurrence

Overview

Journal Clin Cardiol

Specialty Cardiology & Vascular Diseases

Date 2021 Jun 23

PMID 34160828

Citations 2

Authors

Kohei Sawasaki

Yasuya Inden

Natsuko Hosoya

Masahiro Muto

Toyoaki Murohara

Affiliations

Soon will be listed here.

Abstract

Background: Many studies have reported the predictors of atrial fibrillation (AF) recurrence after persistent AF (peAF) ablation. However, the correlation between the atrial defibrillation threshold (DFT) for internal cardioversion (IC) and AF recurrence rate is unknown. Here we investigated the relationship between the DFT prior to catheter ablation for peAF and AF recurrence.

Hypothesis: DFT prior to ablation was the predictive factor for AF recurrence after peAF ablation.

Methods: From June 2016 to May 2019, we enrolled 82 consecutive patients (mean age, 65.0 ± 12.4 years), including 45 with peAF and 37 with long-standing peAF, at Hamamatsu Medical Center. To assess the DFT, we performed IC with gradually increasing energy prior to radiofrequency application.

Results: Forty-nine and 33 patients showed DFT values less than or equal to 10 J (group A) and greater than 10 J or unsuccessful defibrillation (group B). During the mean follow-up duration of 20.5 ± 13.1 months, patients in group B showed significantly higher AF recurrence rates than those in group A after the ablation procedure (p = .017). Multivariate analysis revealed that DFT was the only predictive factor for AF recurrence (odds ratio, 1.07; 95% CI, 1.00-1.13, p = .047).

Conclusions: The DFT for IC was among the strongest prognostic factors in the peAF ablation procedure.

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PMID: 38589914 PMC: 11003012. DOI: 10.1186/s13019-024-02766-z.

Defibrillation threshold of internal cardioversion prior to ablation predicts atrial fibrillation recurrence.

Sawasaki K, Inden Y, Hosoya N, Muto M, Murohara T Clin Cardiol. 2021; 44(8):1169-1176.

PMID: 34160828 PMC: 8364735. DOI: 10.1002/clc.23679.

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