[Surgical procedure in repeated operations on the mitral valve].

The experience in repeated operations on the mitral valve is generalized and the results of 340 repeated closed mitral commissurotomies and 124 operations performed under conditions of extracorporeal circulation are analysed. Hospital mortality in open operations is still rather high (20%), whereas the stability of good results in follow-up periods of up to 5 years is 53.9%. At the same time, the results of repeated closed operations are quite acceptable; low hospital mortality (4.7%), relatively satisfactory stability of good results (55.3% in follow-up periods of up to 10 years). The authors believe that a differentiated approach to the choice of the method for repated operations on the mitral valve is necessary.