[Comparative evaluation of the protective effect of adaptation to short-term stress exposures in damage to the heart and portal vein from long-term stress].

The effect of the preliminary adaptation to short-term stress actions carried out under different conditions was studied in the myocardium and vascular smooth muscle damaged by long-term immobilization stress. The preliminary adaptation performed under "sparing" conditions was shown to protect more effectively the right atrial myocardium and portal vein against damages induced by long-term immobilization than that carried out under stringent conditions. The sparing adaptation allowed avoiding the appearance of the structural "price" of the adaptation, i.e. the depression of myocardial contractile function induced by adaptation itself.