[The absence of a parallelism between the antihypoxic and anti-ischemic actions of pharmacological agents].

The experiments on different species of animals (mice, cats) showed the lack of parallelism between the antihypoxic and anti-ischemic effects of pharmacological agents. Of four studied antihypoxic agents (lithium oxybutyrate, piracetam, glyo-6, a derivative of pyrimidine S-207) only GABA derivatives showed an increase of the lactate/pyruvate ratio in the blood of the venous sinus under occlusion of the coronary artery and consequently possessed the anti-ischemic properties. Such difference in the effects of the antihypoxic agents on the myocardium was determined to a certain degree by their different influences on the collateral coronary blood circulation.