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Ann Thorac Surg 2003;75:1490-1494
© 2003 The Society of Thoracic Surgeons

Original article: cardiovascular

Left atrial maze procedure: a useful addition to other corrective operations

Norihiro Kondo, PhDa, Kenji Takahashi, MDa*, Masahito Minakawa, MDa, Kazuyuki Daitoku, MDa

a Department of Cardiovascular Surgery, Aomori Rousai Hospital, Aomori, Japan

Accepted for publication November 27, 2002.

* Address reprint requests to Dr Takahashi, Department of Cardiovascular Surgery, Aomori Rousai Hospital, 1 Minamigaoka, Shirogane, Hachinohe Aomori 031-0822, Japan.
e-mail: takaken{at}aomorih.rofuku.go.jp

BACKGROUND: The left atrial maze procedure is performed to treat atrial fibrillation (AF), mainly in patients with mitral valve disease. In this study, we assessed the midterm results of this procedure and clinically analyzed predicting factors for postoperative persistent AF.

METHODS: From June 1997 to May 2001, the left atrial maze procedure was performed on 31 patients (29 with mitral valve disease and 2 lone AF). For purposes of analysis, patients were divided postoperatively into those with persistent atrial fibrillation (AF) and those with sinus rhythm (SR), except 2 patients who required pacemaker implantation for sinus node dysfunction. Over a follow-up period of more than 12 months, patients were compared based on their preoperative and intraoperative variables.

RESULTS: At discharge, the success rate was 89.7%. The midterm rates (total of 94.9 patient-years of follow-up) of sinus rhythm and freedom from AF were 72.4% and 79.3%, respectively. There were significant differences in duration of AF, voltage of f-wave at first precordial lead of electrocardiogram, and cardiothoracic ratio between the SR and AF groups.

CONCLUSIONS: Our midterm results suggest that the left atrial maze procedure is an effective alternative adjunct procedure for elective open heart surgery to treat AF, depending upon the patient’s clinical condition.




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