Fifty patients with acute myocardial infarction were examined after infusion of perfluorane. Microcirculatory status was evaluated by biomicroscopy of the eye conjunctival capillaries. Changes in the capillaries were evaluated by B-Ditcel classification. Myocardial status was studied by ECG and EchoCG. Myocardial contractility was assessed by the degree of shortening of the anteroposterior size and ejection fraction. Changes in coagulogram were studied. After the infusion of perfluorane, the number of functioning capillaries increased, venous congestion decreased, arteriolar and venular diameters increased, and hypercoagulation was corrected.