[Metabolic manifestations of myocardial ischemia in the cardialgia syndrome of varying origin (study data on lactate from the coronary sinus, the precardiac stimulation test and coronary angiography)].

Twenty-one patients with various myocardial lesions (myocardial infarction, ischemic heart disease, noncoronarogenous cardialgias) were examined. The atrial stimulation test with collection of blood specimen from the coronary sinus and determination of arteriovenous difference by lactate was conducted. It was established that the beginning of lactate production is the most early and significant sign of myocardial ischemia and is of considerable differential-diagnostic and prognostic value.