[Spiroergometric assessment of the reserves of the heart pumping function at different times following closed mitral commissurotomy].

The paper is concerned with the results of a spiroergometric study of cardiac pumping function reserves (an ability of the heart to increase its output in response to physical load of maximum intensity) and physical working capacity in 35 patients after closed mitral commissurotomy during a dynamic follow-up in the first year after operation. Altogether 30 healthy subjects were entered into a control group. The data obtained made it possible to reveal residual hemodynamic disorders retained for the entire follow-up period and noted with physical load (a decrease in cardiac pumping function reserves) among the examined patients. The disorders determined lowered physical working capacity. The time course of cardiac pumping function reserves and physical working capacity was studied during the first half year after operation. There was no significant change of the studied values in the second half year.