The aim of the study was to assess the frequency of lethal outcomes within one year after hospitalization of patients with acute myocardial infarction (MI), risk factors responsible for the poor prognosis, and main causes of intrahospital mortality. The most common causes of fatal outcomes were cardiogenic shock (52.5%) and arrhythmias (24.4%). Factors influencing long-term prognosis were considered. Unfavorable effect of type 2 diabetes mellitus (DM) on the 7-year survival rate in patients with previous MI was revealed. Survivorship was less affectedin the absence of DM: -0.12 (0.19; 0.07) and 0.36(0.40; 0.029) respectively, p = 0.001.