Objective: The aim of this study is to evaluate the initial results of intraoperative radiofrequency ablation using biatrial procedure to treat chronic atrial fibrillation in patients with associated cardiac disease.Methods: Between February 2008 and May 2009, 15 consecutive patients were underwent mitral valve procedure plus modified radiofrequency biatrial ablation of chronic atrial fibrillation. The mean age was 47.73 ± 9.85 years and 60% were male. The mean left atrial diameter was 55.06 ± 7.56 mm.Results: There were no hospital mortality or complications related to radiofrequency ablation. The mean follow-up period was 7 ± 4 months. At the time of hospital discharge 9 (60%) patients were in sinus rhythm. After a mean follow-up period 11 (73.3%) were in sinus rhythm.Conclusion: Intraoperative biatrial radiofrequency ablation is a safe and effective technique for the treatment of chronic atrial fibrillation, with satisfactory midterms outcomes in terms of conversion to sinus rhythm. Bras Cir Cardiovasc 2010; 25(1): 45-50
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