A case of 51-year old female with large inferior left ventricular aneurysm developed 3 months after myocardial infarction is presented. The patient demonstrated advanced congestive heart failure and angina. Coronarography revealed amputation of the distal part of 3 coronary vessels without possibility of revascularisation. In ventriculography large inferior wall aneurysm was found. Echocardiography strongly suggest the presence of pseudoaneurysm. During the operation very large real aneurysm arising from inferior wall and apex was found. Postoperative period was complicated by many cardiac and non cardiac events. Authors discuss the problems of proper diagnostic and its influence on decision about surgical management.