[Ways to improve the results of mitral valve prosthesis by preservation of the posterior cusp with the subcuspal structures].

Prosthesing the mitral valve with preservation of the posterior cusp was performed in 156 patients. The domestic disk prostheses "Liks", "Emiks" and the bicuspid prosthesis "Medinzh" were used for the implantation. An additional correction of the tricuspid valve was made in 22 patients. The aortal valve needed the correction in 16 patients. The intrahospital lethality was 2.6%. The preservation of the posterior cusp prevents rupture of the posterior wall of the left ventricle, decreases risk of paraprosthetic fistulas and reduces frequency of the development of acute heart failure.