The paper shows comparative analysis of structural-metabolic changes of the ventricular cardiac hystiocytes during transitional restriction of blood supply, which leads to relapsing myocardium hypoperfusion, ischemia and even to cardiac infarction. We have established that an increase of the myocardium arrhythmogenicity, damage of myocardium electrophysiological activity and coronary deficiency are caused by pathologically intensified structural-metabolic heterogeneity of cardiomyocites. The chronic ischemic heart disease is worsening the situation by gradual accumulation of the metastructure changes of heart's working cells. It is possible to connect adaptable hypertrophy of cardiomyocites with compensatory redistribution of loading among them, what is accompanied with the deep reorganization of their metabolism and metastructure under the influence of neurohumoral factors, inadequate transport-trophic maintenance of the function, nonequal edema and fibrosis of the interstitium. The data obtained describe the formation of "prereadiness" of the myocardium to the fatal rhythm disturbance determined by interconnected structural-metabolic changes. Each of these pathological changes separately doesn't induce an impairment of myocardium electric stability but represents a necessary part in origin and development of the pathological process.

• Гавриш Андрій Сергійович (технічні науки)

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