The two-year mortality in 993 patients aged from 29 to 86 years included into the register of the acute myocardial infarction and survived during the first 4 weeks totalled 22.9%. The more frequent causes of lethal outcome was sudden death (31.3%) and progressing circulatory insufficiency (19.1%). A system of factors has been established acting favourably or unfavourably on the late results. Attention is drawn to the fact that different factors act differently in persons of different age.