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Ann Thorac Surg 2002;73:1457-1459
© 2002 The Society of Thoracic Surgeons
a Department of Cardio-Thoracic Surgery, Nagoya University Graduate School of Medicine Nagoya, Japan
b First Department of Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan
Accepted for publication February 6, 2002.
* Address reprint requests to Dr Usui, 65 Tsurumai, Showa-ku, Nagoya 466-8550, Japan
e-mail: ausui{at}med.nagoya-u.ac.jp
Background. Of 41 patients who had undergone a left-sided simple maze procedure, 4 (9.8%) developed repetitive tachycardia due to atrial flutter, and required radiofrequency catheter ablation. Linear ablation of the right atrial isthmus was effective to treat atrial flutter.
Methods. We conducted an electrophysiologic study of atrial flutter and determined its reentry circuit on the atrium. We consider how to reduce atrial flutter after the left-sided simple maze procedure.
Results. Common atrial flutter through the right atrial isthmus was induced in all 4 patients, and linear ablation on the right atrial isthmus was effective in 3 of these. An incisional atrial flutter around the right atriotomy was also induced in 2 of 4 patients; both were successfully treated by linear ablation between the right atriotomy and the inferior vena cava.
Conclusions. Common atrial flutter through the right atrial isthmus is a risk after the left-sided simple maze procedure. When a left-sided simple maze procedure is performed, sufficient cryoablation on the right atrial isthmus of the arrested heart should be administered to prevent postoperative atrial flutter.
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