[Histotopography of several metabolic processes in the heart]

Localization of basic metabolic processes was investigated by histochemical methods in the heart of untrained, trained, and overtrained rats in relative rest state, and at the stage of single and repeated physical loads in case of urtrained rats. In the untrained rat heart myocardium the glycogenolysis and glycolysis processes were more active in the subendocardial layers, and those of fatty acids and ketone bodies oxidation--in the subepicardial layers. Reverse relationships were discovered in the trained and overtrained rats myocardium. The subpericardial layers role for supporting the heart function in sharp activation of its work was demonstrated.