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J Thorac Cardiovasc Surg 2006;132:1390-1397
© 2006 The American Association for Thoracic Surgery

Surgery for Acquired Cardiovascular Disease

Recurrent mitral regurgitation after repair: Should the mitral valve be re-repaired?

Division of Cardiovascular Surgery, Mayo Clinic College of Medicine, Rochester, Minn.

Read at the Eighty-sixth Annual Meeting of The American Association for Thoracic Surgery, Philadelphia, Pa, April 29-May 3, 2006.

Received for publication April 30, 2006; revisions received June 30, 2006; accepted for publication July 12, 2006.

^_* Address for reprints: Rakesh M. Suri, MD, DPhil, Division of Cardiovascular Surgery, Mayo Clinic College of Medicine, 200 First St SW, Rochester, MN 55905 (Email: suri.rakesh{at}mayo.edu).

OBJECTIVE: We sought to evaluate the clinical and echocardiographic outcomes of reoperation for failed mitral valve repair.

METHODS: One hundred forty-five patients with recurrent mitral regurgitation after primary mitral valve repair of degenerative leaflet prolapse underwent mitral valve reoperations between January 1, 1970, and January 1, 2005. The mean age was 66 years, and 102 (70%) were men.

RESULTS: The mean duration from initial repair to reoperation was 4.1 years (standard deviation = ± 5.1 years). Indications for reoperation were regurgitation alone (n = 109 [75%]), hemolysis (n = 27 [19%]), obstruction from systolic anterior motion (n = 3 [2%]), endocarditis (n = 3 [2%]) and stenosis-other (n = 3 [2%]). New pathology was found in 80 (55%) patients, and failure of the initial repair was found in 61 (42%) patients. The mitral valve was re-repaired in 64 (44%) patients and replaced in 81 (56%) patients. Early operative mortality was similar after re-repair and replacement (1.6% vs 4.9%, P = .38). Independent predictors of improved survival on multivariate analysis were mitral re-repair (hazard ratio = 0.44, P = .03), younger age (hazard ratio = 1.06, P = .001), and an operative indication of mitral regurgitation alone (hazard ratio = 0.31, P = .005). Seven patients had a third mitral operation (all replacements), 6 after re-repair and 1 after replacement. At last follow-up echocardiogram (n = 96), ejection fraction was greater (P < .001) and left ventricular end-systolic dimension was smaller (P = .009) in patients undergoing re-repair compared with values in those undergoing valve replacement.

CONCLUSION: Recurrent mitral regurgitation after prior repair is frequently caused by new valve pathology. Mitral re-repair is performed in almost half of patients and is associated with superior survival, improved ejection fraction, and greater regression in ventricular dimension compared with valve replacement.

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