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KMID : 0368120080380110606
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Korean Circulation Journal
2008 Volume.38 No. 11 p.606 ~ p.611
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Atrial Mechanical Function After Maze Procedure for Atrial Fibrillation Concomitant With Mitral Valve Surgery
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Song Bong-Gun
Park Seung-Woo
Cho Soo-Jin
Park Pyo-Won
Lee Sang-Yeob
Kim Jung-Hyuk
Choi Seung-Min
Park Yong-Hwan
Choi Jin-Oh
Lee Sang-Chol
On Young-Keun
Kim June-Soo
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Abstract
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Background and Objectives: The maze procedure is effective in restoring sinus rhythm (SR) in patients with atrial fibrillation (AF). We compared the left atrial mechanical function (LAMF) of patients whose rhythm was converted to SR after maze procedure with that of patients whose rhythm was not converted to SR and determined if preoperative left atrial volume index (LAVI) and immediate postoperative LAMF could predict conversion of AF to SR.
Subjects and Methods: We prospectively evaluated 80 patients with AF treated with the maze procedure between March 2005 and February 2007. LAMF was assessed by looking at left atrial ejection volume (LAEV) and ejection fraction (LAEF) during echocardiography before, 2 weeks after, and 6 months after the procedure.
Results: Of the 80 enrolled patients, 71 were converted to SR after the maze procedure (SR group), and 9 were not converted to SR (AF group). There were no significant differences in age, sex, hypertension, diabetes mellitus, renal failure, stroke, thyroid dysfunction, or smoking history between the groups. Pre-operative LAVI (p=0.010) was a predictor of conversion of AF to SR. LAEF gradually increased in the SR group during follow-up, but not in the AF group.
Conclusion: LAMF recovered in the SR group after the maze procedure, irrespective of clinical presentation and initial LAMF. Preoperative LAVI predicted SR conversion.
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KEYWORD
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Heart surgery, Atrial fibrillation, Left atrial function, Cardiac volume, left atrium
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