Open AccessConversion of atrial fibrillation to sinus rhythm during cryoballoon ablation: A favorable and not unusual phenomenon during second‐generation cryoballoon pulmonary vein isolation
Author(s) -
Maj Riccardo,
Borio Gianluca,
Osório Thiago G.,
Iacopino Saverio,
Ströker Erwin,
Sieira Juan,
Terasawa Muryo,
Rizzo Alessandro,
Scala Oriana,
Galli Alessio,
Varnavas Varnavas,
Paparella Gaetano,
Capulzini Lucio,
Brugada Pedro,
De Asmundis Carlo,
Chierchia Gian B.
Publication year - 2020
Publication title -
journal of arrhythmia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.463
H-Index - 21
eISSN - 1883-2148
pISSN - 1880-4276
DOI - 10.1002/joa3.12301
Subject(s) - medicine , pulmonary vein , atrial fibrillation , ablation , sinus rhythm , cardiology , surgery
Abstract Background The prevalence and the clinical impact of conversion of atrial fibrillation (AF) to sinus rhythm (SR) during cryoballoon ablation (CB‐A) are unknown. Objective The purpose of this study was to evaluate the prevalence of restoration of SR during CB‐A and the clinical impact of this phenomenon. Methods Between January 2012 and September 2018, all patients who experienced conversion of AF to SR during CB‐A were included. This group was subsequently matched for gender, age, type of AF, diagnosis‐to‐ablation time, and left atrial size with patients who underwent CB‐A and did not experienced conversion of AF to SR. After discharge, patients were scheduled for follow‐up visits at 1, 3, 6, and 12 months and 24 hours Holter recordings were obtained at each follow‐up visit. All documented AF episodes of >30 seconds were considered as recurrence. A 3 month post‐procedural blanking period (BP) was applied. Results A total of 1559 patients underwent pulmonary veins isolation by CB‐A between January 2012 and September 2018; among them, 58 patients (3.7%) experienced restoration of SR during CB‐A. In total, 53 patients (41 males [77.3%], mean age 61.4 ± 13.3 years) were included in the case group. During CB‐A, restoration of SR occurred more frequently during right‐side PVs applications (right inferior pulmonary vein 39.6%, right superior pulmonary vein 30.2%). If considering a BP, at 2 year follow‐up, freedom from recurrences was 86.5% in the case group and 68.0% in the control group ( P = .036). Conclusion Conversion of AF to SR is a favorable and relatively frequent phenomenon during cryoballoon pulmonary vein isolation ablation.