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Ann Thorac Surg 2001;72:S1090-S1095
© 2001 The Society of Thoracic Surgeons

Supplement: Cardiothoracic techniques and technologies

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

Krishna Khargi, MDa, Thomas Deneke, MDb, Helmut Haardt, MEa, Bernd Lemke, MDb, Peter Grewe, MDb, Klaus-Michael Müller, MDc, Axel Laczkovics, MDa

a Department of Cardiothoracic Surgery, Berufsgenossenschaftliche, Kliniken Bergmannnsheil-University Hospital Bochum, Bochum, Germany
b Department of Cardiology, Berufsgenossenschaftliche, Kliniken Bergmannnsheil-University Hospital Bochum, Bochum, Germany
c Department of Pathology, Berufsgenossenschaftliche, Kliniken Bergmannnsheil-University Hospital Bochum, Bochum, Germany

Address reprint requests to Dr Khargi, Berufsgenossenschaftliche Kliniken Bergmannsheil-University Hospital Bochum, Buerkle de la Camp Platz 1, 44789 Bochum, Germany
e-mail: krishna.khargi{at}ruhr-uni-bochum.de

Presented at the Seventh Annual Cardiothoracic Techniques and Technologies Meeting 2001, New Orleans, LA, Jan 24–27, 2001.

Background. We evaluated the effectiveness of the saline-irrigated-cooled-tip-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 lesions were made with an SICTRA catheter (20 to 32 W; 200 to 320 mL/h saline). An echocardiography and 24-hour electrocardiogram were obtained 12 months 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 group received a permanent pacemaker because of bradycardia. A fatal renal bleeding and mediastinitis occurred in 2 group A patients, 6 weeks postoperatively. One group A patient had sudden cardiac death at home, 4 months after operation. One patient from each group had lethal respiratory failure, 7 and 10 months after operation. Survival after 12 months for group A and B was 73% and 93% (p = 0.131).

Conclusions. The SICTRA appeared to be an effective technique to perform the Maze procedure.




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