Objective. To determine the type and timing of ventricular cardiac arrhythmias after surgical treatment of post-infarction left ventricular aneurysms type 2–3 (M. Di Donato – L. Menicanti classification) in patients with ejection fraction less than 30%. Material and methods. In 16 patients with ejection fraction < 30% and left ventricular aneurysms type 2–3 (M. Di Donato – L. Menicanti) the implantable cardioverter defibrillators (ICD) were placed in the early postoperative period after surgical correction of coronary heart disease. Diagnosis of ventricular cardiac arrhythmias was carried out at full-time follow-up, and with the use of remote monitoring system CareLink. The duration of follow-up was 579.3±285.3 days. Results. During all the time of observation 43.7% (7 of 16) patients had life-threatening ventricular arrhythmias. In-hospital ventricular tachycardia (VT) occurred in 5 patients. In the intensive care department VT was recorded in 2 patients, in 3 patients during the rehabilitation stage, which required the application of ICD therapy. In-hospital mortality was not observed in this group of patients. In the late period VT occurred in 2 patients. In total observation time 3 patients died, mortality was 18.7%. According to the follow-up ventricular arrhythmias were not observed in the dead patients, presumably they died from progression of chronic heart failure. Conclusion. In our series of observations after surgical correction of left ventricular aneurysms type 2–3 (M. Di Donato – L. Menicanti) in patients with an ejection fraction less than 30% ventricular tachycardia occurred in 7 patients (43.7%) within 1 year. In 5 patients these arrhythmias developed in the early postoperative period (up to 10 days). ICD implantation in the early postoperative period is useful for prevention of sudden cardiac death in these patients.