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The Annals of Thoracic Surgery, Vol 46, 491-494, Copyright © 1988 by The Society of Thoracic Surgeons

ARTICLES

Rupture of the posterior wall of the left ventricle after mitral valve replacement: etiological and technical considerations

M Azariades and SC Lennox
Department of Cardiothoracic Surgery, Brompton Hospital, London, U.K.

Rupture of the posterior wall of the left ventricle after mitral valve replacement, although infrequent, may be a highly lethal complication. Controversy exists regarding the etiology of this complication. Suggested causative factors include the type and extent of the valvular disease, type and size of the prosthesis, and the surgical techniques used. Our experience over a 20-year period includes 10 patients with rupture of the left ventricle following mitral valve replacement. In all patients, both mitral leaflets were excised together with the attached chordae. Three patients survived after repair of the rupture. Repair consisted of compressing the area between the left atrium and the base of the papillary muscle using two strips of Teflon and deep mattress sutures passed beneath the coronary vessels in the atrioventricular groove. Since 1983 we have routinely preserved the posterior leaflet of the mitral valve with its attached chordae to maintain a "tethered loop" between the mitral valve and ventricle. No further ruptures have occurred. The technique used for repair represents reconstitution of the divided loop between the ventricle and the mitral valve.

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