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Ann Thorac Surg 1994;58:163-167
© 1994 The Society of Thoracic Surgeons

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Articles

Intraatrial insertion of a mitral prosthesis in a destroyed or calcified mitral annulus

Department of Thoracic and Cardiovascular Surgery, Hôpital de la Pitié, Paris, France

Accepted for publication November 13, 1993.

^_* Address reprint requests to Dr Nataf, Service de Chirurgie Cardiovasculaire, Hôpital de la Pitié, 83 Bd de l'Hôpital, 75013 Paris, France.

Infectious lesions and extreme calcification of the mitral valve annulus can make classic anatomic implantation of a prosthesis impossible. Confronted with these circumstances, we have developed a technique of intraatrial insertion of a mitial prosthesis. The prosthesis has been modified by enlarging the circumference of the sewing ring with a Dacron collar. The collar can be sutured to the left atrial wall above the mitral annulus. From 1981 to 1989, this technique has been employed in 36 patients: 15 had acute valve endocarditis with destruction of the mitral annulus and 21 had extensive annular calcification. In all cases, circumferential or partial intraatrial insertion permitted a secure implantation of the prosthesis. One operative death was related to the technique. It was an intractable bleeding caused by tearing of the very thin and fragile wall of the left atrium in a kidney transplant patient. Four patients were reoperated on for periprosthetic leak, in 3 of whom healing and cleaning of the mitral annulus permitted annular implantation of a prosthetic valve. There was no ventricular wall rupture. Our results suggest that the technique can be performed in high operative risk patients when mitral valve replacement is impossible by conventional techniques.

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