[Physical activity and the work capacity of patients with artificial heart valves before and after rehabilitation]. 
The physical condition of patients how underwent operations for prosthetics of one or more valves was appraised in five groups (as recommended by N. M. Amosov and Y. A. Bendet) according to the PWC170 value of the threshold load level.  On admission to the department, rehabilitation (in 17 days after the operation, on the average) of 50% of patients was referred to group IV.  One year after operation the physical working capacity of patients grew markedly: 40.7% were referred to group II.