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J Thorac Cardiovasc Surg 2007;133:1257-1263
© 2007 The American Association for Thoracic Surgery

Surgery for Acquired Cardiovascular Disease

Comparison of recovery after mitral valve repair and replacement

^a Christiana Care Health System, Newark, Del
^b Toronto General Hospital, Toronto, Ontario, Canada
^c Emory University, Atlanta, Ga
^d Mid America Heart Institute, Saint Luke’s Hospital, Kansas City, Mo.

Received for publication September 20, 2006; revisions received November 27, 2006; accepted for publication December 12, 2006.

^_* Address for reprints: Liping Zhao, MSPH, Christiana Care Center for Outcomes Research, Christiana Care Health System, 131 Continental Drive, Suite 202, Newark, DE 19713. (Email: lzhao{at}christianacare.org).

Objective: We sought to examine the comparative improvement in health status after primary mitral valve repair versus replacement in patients with mitral valve regurgitation in a longitudinal setting.

Methods: We prospectively followed 267 patients with mitral valve regurgitation who underwent primary mitral valve repair (n = 163) and replacement (n = 104) between January 2002 and January 2005. Health status was evaluated at baseline and 1, 3, and 12 months after surgery with the validated short-form 36 and analyzed using generalized estimating equations with adjustment for propensity scores.

Results: Compared with patients undergoing mitral valve replacement, patients requiring valve repair were younger and more likely to be male. The probability of postsurgical readmission because of cardiac events was low and similar between the two treatment groups. New York Heart Association functional class was significantly improved after both procedures, with better improvement achieved by mitral valve repair (P < .01). For both treatment groups, scores for most of the short-form 36 domains were depressed at 1 month; however, after 3- and 12-month lags, dramatic improvements were achieved in most of the domains. Adjusted changes in the physical component score were similar between the two arms at each follow-up. For the mental component score, patients who underwent repair showed significant improvements compared with patients who underwent replacement at both 3 months (difference: 4.84 points, P = .005) and 12 months (difference: 5.92 points, P < .001).

Conclusions: Our study suggests that after mitral valve surgery, there is significant improvement in New York Heart Association functional class and health status, especially in patients undergoing mitral valve repair.

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