The results are presented od surgical treatment of 18 patients operated on in the Cardiosurgery Department, Institute of Cardiology, Medical Academy in Lódź, in the years 1985-1989, for complications of myocardial infarction. The material includes such complications as: post-infarction perforation of the septum, and post-infarction aneurysm of the left ventricle. The usefulness of specialized examinations is shown in qualifying the patients for operation, and the method is presented of carrying out operations in these patients in extracorporeal circulation. Good results of surgical treatment were achieved.