As many as 135 patients with myocardial infarction were under observation for a year. All the patients had received thrombolytic therapy 3.9 +/- 0.2 h on the average after the onset of an anginous attack. The patients with the recovered coronary blood flow (group I) manifested a more frequent occurrence of angina pectoris (38%) and repeated myocardial infarctions (8%) as compared to those with persisting occlusion of the coronary artery (group 2) - 12 and 1.6% respectively. According to the coronary angiography, group I patients with angina pectoris showed high values of the degree of residual stenosis; the development of reocclusion characterized by the asymptomatic course at the long-term period. Group I patients were noted to have a decrease in the hospital lethality and lethality during the first year.