Insight from Redo Ablation in Patients with Atrial Fibrillation

Ji Eun Ban, Yae Min Park, Dae In Lee, Jong Il Choi, Hong Euy Lim, Sang Weon Park, Young Hoon Kim

Research output: Contribution to journalArticlepeer-review


Background: This study sought to determine the electroanatomical characteristics of recurrent atrial fibrillation (AF) identified during redo Catheter ablation (CA) of AF. Methods: Of 1374 patients with CA of AF, 173 consecutive patients (12.6%) underwent redo CA were studied. One hundred forty seven (85.0%) patients underwent a 2nd repeat procedure, and 3rd and 4th and 5th repeat procedure was performed in 20 (11.6%), 5 (2.9%), and 1 (0.5%), respectively. Results: In 173 patients (54 ±11 years), 90 paroxysmal AF and 83 non paroxysmal AF were identified. The LA volume measured by 3-dimensional CT (106.3 ± 34.7ml) became significantly smaller than that at first CA (130.6 ± 50.3ml, P=0.02). In 2nd redo procedure, all PV reconnection was observed in 55 patients (38.2%). PV reconnection as etiology of recurred AF was not common, but its incidence was higher in patients who underwent redo <2 years (29.9% vs. 8.0%, P=0.06). PV stenosis was present in 23 of 173 patients (13.3%), which commonly developed at a single PV (65.2%), and mostly asymptomatic and often occurred in patients with carina ablation. Conclusions: The LA volume was significantly decreased at redo procedure. PV reconnection was not major etiology of recurrent AF, but commonly found in patients underwent redo <2 years. Asymptomatic PV stenosis was not uncommon. The result from redo ablation could guide more effective and safer ablation strategy.

Original languageEnglish
Pages (from-to)272
Number of pages1
Journaljournal of arrhythmia
Issue number4
Publication statusPublished - 2011


  • atrial fibrillation
  • redo ablation

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine


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