The purpose of the study was to investigate specific features of systolic and diastolic functions of the left ventricle (LV) in patients with acute myocardial infarction (AMI), complicated by acute left ventricular failure (ALVF) and to estimate their prognostic value. We examined 90 patients with AMI. The following types of left ventricular dysfunction were detected in patients with ALVF: systolic dysfunction (25%), restrictive filling pattern of mitral flow (11.7%), combined dysfunction (31.7%); whereas 31.7% of these patients had no severe dysfunction of LV. The presence of restrictive filling pattern affected negatively the course of AMI, development of complications, and processes of postinfarction remodeling.