Rupture of the free wall of the left ventricle is a rare complication of acute myocardial infarction and in most cases ends fatally. The patient at the age of 60 was hospitalized in order to myocardial infarction. Coronarographically, occluded arteria coronaria circumflexa was determined, dilatation was unsuccessful and the continuation with drug therapy. Nine days later, he suddenly felt pressure in the chest and general weakness. Urgent echocardiography demonstrated cardiac tamponade and he was immediately sent to emergent surgery. The patient an excellente recovery and two weeks after was discharged home.