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Ann Thorac Surg 2005;79:2115-2118
© 2005 The Society of Thoracic Surgeons

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New technology

Midterm Clinical Experience With Microwave Surgical Ablation of Atrial Fibrillation

Legacy Health Systems, Good Samaritan Hospital, Portland, Oregon USA and Emanuel Hospital, Portland, Oregon, USA

Accepted for publication June 11, 2004.

^_* Address reprint requests to Dr Molloy, Legacy Health Systems, 2222 NW Lovejoy, Suite 315, Portland, OR 97210 (E-mail: tmolloy302{at}aol.com).

PURPOSE: Multiple energy sources and lesion sets have been described as an alternative to the conventional cut-and-sew Maze procedure for atrial fibrillation (AF). Described are midterm results with microwave (MW) energy and a single left-sided lesion set so that surgeons can evaluate whether this approach may be appropriate for their patients.

DESCRIPTION: Twenty-nine consecutive patients with chronic (86%) or paroxysmal (14%) AF, undergoing surgery for coexisting heart disease, also underwent MW AF ablation by the use of a single lesion set. A single preoperative and postoperative management regimen was used.

EVALUATION: One hundred percent electrocardiogram follow-up was obtained. At minimum follow-up of 4 months (mean 315 days), 23 of 28 patients (86%) were in stable sinus rhythm.

CONCLUSIONS: The simplified lesion set performed with MW energy compares favorably with the cut-and-sew Maze procedure for patients presenting with AF and coexisting acquired cardiac disease. Connecting lesions to the mitral annulus and right-sided lesions may add potential morbidity without additional efficacy.

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