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Left atrial versus bi-atrial maze operation using intraoperatively cooled-tip radiofrequency ablation in patients undergoing open-heart surgery

Safety and efficacy

Thomas Deneke, MD^*,*, Krishna Khargi, MD, Peter Hubert Grewe, MD^*, Stefan von Dryander, MD^*, Frank Kuschkowitz, MD, Thomas Lawo, MD^*, Klaus-Michael Müller, MD, Axel Laczkovics, MD and Bernd Lemke, MD^*

^* Department of Cardiology/Angiology, Bochum, Germany
Clinic of Cardiothoracic Surgery, Bochum, Germany
Institute of Pathology, "Bergmannsheil," University Hospital, Bochum, Germany

View larger version (25K): [in a new window]   Figure 1 Schematic view of the ablation pattern (dotted black lines) in the left atrium; surgical access was through the Waterstone Grove. The encircling ablation lesions around each pulmonary vein’s ostium and the interconnecting lines, as well as additional lines to the mitral valve (MV) annulus and the excision of the left auricle (LA), are shown. LIPV = left inferior pulmonary vein; LSPV = left superior pulmonary vein; RIVP = right inferior pulmonary vein; RSPV = right superior pulmonary vein.

View larger version (13K): [in a new window]   Figure 2 Cumulative rates of sinus rhythm during postoperative follow-up (group A = left atrial Maze procedure; group B = bi-atrial Maze procedure).

View larger version (13K): [in a new window]   Figure 3 Cumulative survival of patients during postoperative follow-up (group A = left atrial Maze procedure; group B = bi-atrial Maze procedure).