Patient's tolerance of physical effort after mitral valve replacement in durable post-operative periods

It is reasonable for the replacement findings of the mitral valve in case of durable post-operative periods, to evaluate patient's tolerance of physical effort, which results, first of all, in the condition of the cardio-vascular system. Taking into consideration the seriousness of patients' condition of under study, data about physical tolerance may be received with the help of dosed physical effort. A group of factors, also choice of mitral valve replacement method, influences on degree of patients' physical effort. The more preferable method of correction of mitral valve disease in case of prosthesis is a preservation of subvalvular structures of mitral valve.