Copyright © 1991 by the European Society of Cardiology.
© 1991 The European Society of Cardiology
Aetiology of surgically treated mitral regurgitation



* Service du Professeur Acar, Hôpital Tenon Paris
Service du Professeur Delahaye, Hôpital Louis Pradel Lyon
Laboratoire d'Anatomopathologie, Hôpital Broussais Paris
Laboratoire d'Anatomopathologie, Hôpital Pitie Salpetriere Paris, France
Correspondence: P. Luxereau. Hôpital Tenon, Service de Cardiologic, 4 Rue de la Chine, 75970 Paris Cedex 20 France.
The aetiologies of mitral regurgitation were reviewed in 336 patients operated on between 1970 and 1990. The relative frequency of rheumatic fever has decreased and the most common cause is now primary mitral valve prolapse (PMVP) which accounts for 60% of all patients. The increasing age of the surgical population seems to be one of the main factors of this change.
Conservative surgical repair according lo Carpentier's technique k now performed in 60% of all patients with mitral regurgitation and 80% of cases of PMVP. The aetiology of PMVP is still under discussion. Surgical description seems to indicate the existence of two different morphological aspects with signrficantly different rates and localizations of chordae ruptures, but our study failed to demonstrate any other anatomical, clinical or histological differences between the two groups.
Key Words: Mitral regurgitation aetiology mitral valve prolapse chordae rupture myxoid degeneration mitral surgery
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