[Combined disorders of the central and regional hemodynamics and microcirculation in myocardial infarct].

Central and regional hemodynamics was studied in 228 patients with acute myocardial infarction by a complex of radio-indication tests. It was established that the degree of changes in central hemodynamics correlates to a definite extent with the severity of myocardial involvement (size of the damaged zone). Regional hemodynamics did not always change parallel to the reduction in cardiac output. The character of circulation in the organs of patients with myocardial infarction depends greatly on the internal control factors and the degree of tonic tension of the regional vessels. Changes in the regional circulation in myocardial infarction lead to hypoxia of the organ and severe disturbances in its function. In most patients the intraorganic hemodynamics decrease gradient was 11/2-2 times more than the cardiac output reduction gradient. Hemodynamic changes in myocardial infarction at the level of different vessels are of a multicomponent and non-linear character. The extent and rate of restoration of intra-organic hemodynamics are greatly determined by the severity of myocardial infraction and the presence of complications.