We questioned whether Complex Fractionated Atrial Electrogram (CFAE) can recur at the same site as in first ablation and relate to outcome of the patients underwent redo catheter ablation (re-CA) of atrial fibrillation (AF). METHODS Out of 173 patients undergoing re-CA of AF, 7 patients (3.4%, 60± 12 years) in whom automated CFAE (NavX map) guided ablation was performed at the first and re-CA were studied. RESULTS Mean time interval to re-CA was 21± 11 months. In 4 of 7 patients (57.1%), no PV reconnection was observed at re-CA. In 6 of 7 patients, LA septum and anterior wall near the LA appendage (LAA) were the most common recurrence sites of CFAE. In 3 patients, AF terminated during ablation of recurrent CFAEs. The CFAE CL became longer (62.5± 10.7ms vs. 88.9± 30.7ms, P=0.06) and % of area of CFAE smaller (3.0± 1.3% vs. 0.8± 0.9%, P=0.003) than in those at the first ablation. There were no significant differences in LA diameter and LA volume (46.1± 8.8mm vs 41.9± 8.9mm, P=NS, 144± 57.6 cm3 vs 121± 47.2 cm3, P=NS) between two procedures. CONCLUSIONS In re-CA, areas of CFAE became smaller and CFAE CL longer than in those at first ablation. The CFAEs at the septum and peri-LAA were frequently recurred, in which AF terminated during re-CA in 43%.
- atrial fibrillation
- complex fractionated atrial electrogram
ASJC Scopus subject areas
- Cardiology and Cardiovascular Medicine