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The aim of the research is to study the peculiarities of the course of stable angina pectoris (STA) of different functional classes (FC) with postinfarction and diffuse cardiosclerosis. 120 patients with an objectified diagnosis of STA of II and III FC, who were divided into two groups, were examined during our research: the 1st group included the patients with verified STA of II FC and the 2nd group included the patients with heart contractions (HC) of III FC (25.83 and 74.17% of cases, respectively).