[Comparative study of the results of prosthesis implantation and reconstructive surgery of the mitral valve in congenital insufficiency].

In 23 of 154 patients with congenital mitral valve (MV) insufficiency the MV prosthetics was conducted, and in 23-valve-preserving reconstructive operation. Operative procedures were depicted, early and late follow-up results were analyzed. After the valve-preserving operation conduction hospital lethality was 8.