The aim of the article was to study exercise tolerance, functional state of left ventricle (LV), blood aldosterone level in 60 patients (pts) after Q-wave myocardial infarction (MI) at 2-year follow-up. Hemodynamic parameters were determined at echocardiography, 6-minute walking test was performed. First functional class (FC) and preserved LV systolic function (EF more than 50 %) at rest and during physical exercise were associated with normal blood aldosterone level. Patients with 2nd and 3rd FC and EF more than 45 % had blood aldosterone level increased by more than 1.5 times. Patients with 3rd FC and EF less than 45 % had blood aldosterone level increased by more than two times. Exercise tolerance was related to systolic function and aldosterone level.