A study concerning vitamins A, C, E content in the blood of 22 patients with stable exercise-induced angina and in those patients (n = 28) with postinfarction cardiosclerosis without circulation failure was carried out. In patients with stable exertional angina, the blood plasma content of vitamin C has been shown to be on the increase, those patients with postinfarction cardiosclerosis revealed a rise in vitamin A in erythrocytes and that in vitamin C in blood plasma. After successful antianginal therapy the content of vitamin C in the blood plasma and erythrocytes has gotten normalized, that of vitamin A in red cells has also returned to normal.