Key result
Preoperative left atrial volume index predicts sinus rhythm conversion and functional recovery after maze procedure.
Why the study?
The study aimed to compare left atrial mechanical function after maze procedure in patients with AF converted to sinus rhythm versus those not converted and to identify predictors of conversion.
Does successful conversion to sinus rhythm after the maze procedure improve left atrial mechanical function in patients with AF?
Cohort (n=80)
Does successful conversion to sinus rhythm after the maze procedure improve left atrial mechanical function in patients with AF?
Successful conversion to sinus rhythm after the maze procedure leads to progressive recovery of left atrial mechanical function, and preoperative left atrial volume index can predict this conversion.
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. (Korean Circ J 2008;38:606-611)
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Song et al. (2008) conducted a cohort in Atrial fibrillation (n=80). Conversion to sinus rhythm after maze procedure vs. Non-conversion to sinus rhythm was evaluated on Conversion of atrial fibrillation to sinus rhythm and left atrial mechanical function (p=0.010). Preoperative left atrial volume index predicted conversion to sinus rhythm after the maze procedure (p=0.010), and left atrial ejection fraction gradually increased only in those who converted.
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