[Comparative analysis of pathophysiologic mechanisms of myocardial infarction development under conditions of physical and information load in patients with ischemic heart disease].

The results of examination on a bicycle ergometer and the information test with continuous electrocardiographic and hemodynamic control by means of impedance plethysmography showed that the cardiovascular system of patients with ischemic heart disease is desadapted to physical and informative load, which was manifested by ischemia of the myocardium and disorders of its contractility in both types of loading. The pathogenetic mechanisms of the development of myocardial ischemia in most patients with ischemic heart disease under conditions of physical and information loads differ. In information load, ischemia of the myocardium is a consequence of coronary vasospasm in 72.7% of patients and only in 27.3% of cases it is caused by deficient perfusion of the myocardium with blood in stenosed coronary arteries and increased myocardial requirements for oxygen. Inverse tendencies are encountered in physical load.