[Bloodless evaluation of the degree of disorders of pulmonary circulation in patients with acquired heart defects].

A multistage treadmill test was conducted by the authors' program in 75 patients with mitral and aortic valvular disease and in 25 healthy individuals with noninvasive evaluation of the anaerobic threshold (AT) and the pumping function of the heart according to the dynamics of the oxygen debt. During the treadmill test in patients with pulmonary hypertension and arterio-capillary type of stasis in pulmonary circulation the AT occurred before the pumping function of the heart became decompensated. The diagnostic sensitivity of the AT outstripping appearance to marked types of pulmonary circulation stasis was 48% and to pulmonary hypertension - 80%. It was found that the AT occurring in the treadmill test before disorders of heart pumping function is an unfavourable prognostic criterion for late-term (8-12 months) results of isolated mitral valve prosthetics.