Recurrent arrhythmias after catheter ablation of originally paroxysmal atrial fibrillation and results of repeat ablation

Authors: M. Fiala ;  J. Chovančík ;  R. Moravec ;  D. Wojnarová ;  H. Szymeczek ;  R. Neuwirth ;  R. Nevřalová ;  O. Jiravský ;  J. Januška ;  L. Škňouřil ;  M. Dorda ;  J. Indrák ;  J. Černý ;  I. Nykl ;  M. Branny
Authors‘ workplace: Oddělení kardiologie, Kardiocentrum, Nemocnice Podlesí, a. s., Třinec, přednosta prim. MUDr. Marian Branny
Published in: Vnitř Lék 2007; 53(12): 1248-1254
Category: Original Contributions


The aim is a description of the recurrent arrhythmias after previous ablation of paroxysmal atrial fibrillation (AF), and the results of a repeat catheter ablation.

A repeat ablation was performed in 76 patients (18 females, 54 ± 11 years) in 96 procedures, which was 21 % out of 362 patients, who had undergone the first ablation for a paroxysmal AF. The endpoints of the repeat ablation were re-isolation of the pulmonary veins (PV) and termination of a spontaneous or induced arrhythmia and restoration of a stable sinus rhythm (SR), and possibly achievement of noninducibility of any arrhythmia.

Clinical left atrial tachycardia (LAT) was present in 10 (13 %) patients before the first, and in 5 (25 %) patients before the second repeat ablation. Arrhythmia arising from an arrhythmogenic PV due to the conduction recovery into the left atrium (LA) was found in 50 (66 %) patients during the first, and in 7 (35 %) patients during the second repeat ablation. Arrhythmias, predominantly of the reentry mechanism and originating in the LA free wall, were found in 26 (34 %), respectively 13 (65 %) during the first or the second repeat ablation. All arrhythmias from PVs were terminated by a PV encircling ablation. Substrate-related arrhythmias were terminated by ablation except for 2 (3 %) patients during the first and 3 (15 %) patients during the second repeat ablation. Persistent AF was mainly terminated via conversion into a LAT. In these cases, the ablation sites leading to the SR restoration were, similarly to the primary LATs, located predominantly in the LA anterior wall. During the 22 ± 13 months follow-up, 68 (89 %) patients were free of AF, 54 (71 %) patients off the antiarrhythmic drugs and 14 (18 %) patients with the class I or III antiarrhythmic drugs.

AF associated with PV-LA re-connection dominated prior to the first repeat ablation, then the proportion of the substrate-related arrhythmias from the LA free wall increased. Clinical efficacy of the repeat ablation is high.

Key words:
atrial fibrillation – catheter ablation – recurrent arrhythmias – repeat ablation


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