The communication is based on the observation of 573 patients with acute and sub-acute myocardial infarction. The arrangement of intensive care units and wards permitted to render timely and qualified aid to the patients with myocardial infarction, to reduce the percentage of complications, and in cases of the development of the signs of clinical death to undertake immediate resuscitation measures. Of the 123 patients in whom clinical death was recorded, 34 were successfully resuscitated (27.6%). The problems of the management, prognosis and prevention of clinical death are discussed. The great importance of a proper arrangement of the intensive care units, of the qualification of the staff on duty and of continuous monitoring is emphasized. Electroimpulse therapy of acute rhythm disorders is highly praised as well as the employment of anti-arrhythic agents (lidocaine, hilurithamal, novocainamide, panangin) in such situations. The tactics in cases of atrioventricular block developing in such patients is described.