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Ann Thorac Surg 2001;71:577-581
© 2001 The Society of Thoracic Surgeons

Original article: cardiovascular

Clinical analysis of results of a simple left atrial procedure for chronic atrial fibrillation

Katsuhiko Imai, MDa, Taijiro Sueda, MDa, Kazumasa Orihashi, MDa, Masanobu Watari, MDa, Yuichiro Matsuura, MDa

a First Department of Surgery, Hiroshima University School of Medicine, Hiroshima, Japan

Accepted for publication June 6, 2000.

Address reprint requests to Dr Imai, First Department of Surgery, Hiroshima University School of Medicine 1-2-3 Kasumi, Minami-ku, Hiroshima, 734-8551, Japan
e-mail: kimai{at}mcai.med.hiroshima-u.ac.jp

Background. We have performed a simple left atrial procedure for eliminating chronic atrial fibrillation (AF) associated with mitral valve disease. This article analyzes the midterm results of this procedure.

Methods. Thirty-two patients were enrolled in this study concomitant with mitral valve operations. Patients were divided into two groups (AF- and AF+). We examined the efficacy of this operation and atrial function for more than 12 months of follow-up.

Results. In a total of 98.5 patient years of follow-up, AF was absent 3 years after operation in 74%. Of preoperative and intraoperative variables, only long duration of AF was a predisposing factor for recurrence of AF (p < 0.05). In the AF- group, 5 patients (21%) showed atrial tachycardia or flutter and 5 (21%) needed postoperative pacemaker implantation. An A wave was detected in 60% across the mitral valve and 100% across the tricuspid.

Conclusions. A simple left atrial procedure is effective for chronic AF with mitral valve disease and restores atrial transport function during midterm follow-up. However, other atrial arrhythmias occur in some patients postoperatively.




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