Modern medicine faces the problem of the study growth of cardiovascular pathology. Given the high medical and social significance of the problem of treating patients with coronary heart disease and acute myocardial infarction, the search for new effective methods to prevent or mitigate ischemic myocardial damage and mechanisms for their implementation is an urgent task of modern experimental and clinical medicine. The aim of the study was to determine the infarct-limiting efficacy of pharmacological postconditioning using lactic acid in rat myocardial ischemia-reperfusion in the experiment. The study found that remote ischemic postconditioning (RIPostC), which was reproduced by 15-minute lower limb ischemia and performed 10 minutes after 30-minute acute myocardial ischemia with subsequent 120-minute reperfusion, had a infarct-limiting effect and was accompanied by an increase in the plasma lactate level in rats by 87.7 % (p < 0.05) compared with intact animals. It was revealed that the introduction of L-lactate into the left common jugular vein at a dose of 10 mg/kg, which was carried out in 25 minutes after the onset of reperfusion under conditions of myocardial ischemia (30 minutes) and next reperfusion (120 minutes), as well as RIPostC, have the infarct-limiting effect. Apparently, the increase blood lactate level (hyperlactatemia) that occurs after RIPostC in myocardial ischemia-reperfusion, it has a value in its implementation of the infarctlimiting effect.
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