Clinical significance of functional classification of hemodynamic disorders in cardiac surgical patients with heart defects

A multistage treadmill test was conducted according to a developed program of noninvasive appraisal of heart pumping function in 128 patients with rheumatic mitral or aortic valvular diseases before and in 95 patients 1-3 yours after prosthesis of the heart valves. It is proved that functional classifications employing maximum load indices reflect central hemodynamics less adequately than does noninvasive appraisal of the heart pumping function, particularly before operation in seriously ill patients. It is shown that on the basis of classifications according to the O2-debt dynamics, in distinction from maximum O2 consumption, the course of the immediate postoperative period and the late-term results of the operation can be predicted and the initial signs of the dysfunctions of the heart valve prosthesis revealed.