CaCl2 and aconitic models of arrhythmias were reproduced in experiments with rats. Sodium salicylate was found to decrease the preventive effect of ecetylnovocainamidum and increased the effect of novocainamidum on ECG changes. Sodium salicylate diminished the preventive effect of acetyl-novocainamidum by elevating myocardial Na+ concentrations, favoured the decrease in myocardial K+ levels, eliminated the preventive effects of novocainamide and acetylnovocainamide by altering myocardial energy metabolism in CaCl2-induced arrhythmia and improved the preventive effect of acetyl-novocainamide on these parameters in aconitic arrhythmia.
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