Copyright © 1997 by the European Society of Cardiology.
© 1997 The European Society of Cardiology
Superiority of mitral valve repair in surgery for degenerative mitral regurgitation
Regional Cardiac Unit, Papworth Hospital Cambridge, U.K.
revised 9 October 1996; accepted 16 October 1996.
Correspondence: Dr E. M. Lee, C/O Dr. Shapiro, Regional Cardiac Unit, Papworth Hospital, Papworth Everard, Cambridge CB3 8RE, U.K.
Abstract
OBJECTIVES: We aimed to assess the influence of type of operation on outcome in degenerative mitral regurgitation.
METHODS: We compared outcomes in 278 consecutive patients who underwent mitral valve repair (167 patients), replacement with subvalvular preservation (22 patients) and without subvalvular preservation (89 patients) for degenerative mitral regurgitation.
RESULTS: There was a trend towards lower mortality with repair and replacement with subvalvular preservation compared to replacement without subvalvular preservation. Thirty-day mortality was 1·2% vs 0·0% vs 4·7% (ns) respectively. Six-year survival was, respectively, 67·8±7·4% (P=0·088) vs 80·8±11·0% (P=0·25 vs 63·3±5·9% for all-cause death, 78·5±6·8% (P=0·063) vs 95·5±4·4% (P=0·092) vs 67·6±5·9% for all complication-related death and 80·5±6·9% (P=0·076) vs 100·0±0·0% (P=0·045) vs 72· ± 5·8% for complication-related death due to myocardial failure. Multivariate analysis confirmed independent beneficial effects from repair compared to replacement without subvalvular preservation on complication-related death (hazard ratio 0·42, P=0·010) and death from myocardial failure (hazard ratio 0·40 P=0·014), and from repair compared to mechanical replacement on thromboembolism (hazard ratio 0·45, P=0·029) and anticoagulation-related haemorrhage (hazard ratio 0·19, P=0·026).
CONCLUSIONS: Mitral valve repair is superior to replacement. The greatest survival advantage is in reduced mortality from myocardial failure. Repair should be the operation of choice for degenerative mitral regurgitation.
Key Words: Mitral regurgitation • mitral valve repair • degenerative valve disease
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