Saline-irrigated, cooled-tip radiofrequency ablation is an effective technique to perform the maze procedure

Background. We evaluated the effectiveness of the saline-irrigated-cooled-t ip-radiofrequency ablation (SICTRA) to produce linear intraatrial lesions. Methods. Thirty patients with chronic atrial fibrillation and mitral valve disease were consecutively randomized to have mitral valve operation either with a Maze procedure (group A) or without (group B). Intraatrial linear l esions were made with an SICTRA catheter (20 to 32 W; 200 to 320 mL/h salin e). An echocardiography and 24-hour electrocardiogram were obtained 12 mont hs postoperatively. Results. The cumulative frequencies of sinus rhythm in group A and B were 0 .80 and 0.27 (p < 0.01). Restored biatrial contraction was present in 66.7% (6 of 9) of the group A patients in sinus rhythm. One patient from each gr oup received a permanent pacemaker because of bradycardia. A fatal renal bl eeding and mediastinitis occurred in 2 group A patients, 6 weeks postoperat ively. One group A patient had sudden cardiac death at home, 4 months after operation. One patient from each group had lethal respiratory failure, 7 a nd 10 months after operation. Survival after 12 months for group A and B wa s 73% and 93% (p = 0.131). Conclusions. The SICTRA appeared to be an effective technique to perform th e Maze procedure. (C) 2001 by The Society of Thoracic Surgeons.