Myocardial infarction, due to complete occlusion of a coronary artery, is a frequent disease which must be diagnosed as rapidly as possible on the basis of clinical and electrocardiographic arguments in order to allow rapid medicalized management; medical ambulance, followed by admission to the intensive care unit. Treatment is designed to disobstruct the coronary occlusion as rapidly as possible, either by intravenous fibrinolysis or by percutaneous transluminal coronary angioplasty in a specialized centre. The subsequent assessment (stress test, coronary angiography) guides the indications for secondary revascularization.