Chronic heart failure (CHF) is one of the most common, rapidly progressive diseases of the cardiovascular system with the most unfavorable prognosis in many countries. In the world, approximately 2 % of the adult population suffer from heart failure; in most cases, these are people over 70 years old and approximately half of them have a left ventricular ejection fraction (LVEF) of less than 50% [1; 2]. According to the results of large epidemiological and randomized studies, one-year mortality in this population remains high, reaching 60% among patients with functional classes III-IV (FC). According to various data, from 1 to 4% of cases of emergency hospitalization among adults occur due to heart failure and, undoubtedly, in each case, an underestimation of the condition is possible due to difficulties in diagnosis [3; 4]. Dilated cardiomyopathy (DCMP) is one of the diseases that leads to severe forms of heart failure; it can be asymptomatic for a long time, despite the presence of objective (echocardiographic) signs of ventricular dilation and impaired function [9]. Most often, the first clinical manifestations of the disease are associated with cardiac decompensation, stagnation of blood in the small and then in the large circulatory circles and a decrease in cardiac output [10; 11]. This report describes a clinical case of declatational cardiomyopathy in a 39-year-old young patient. Observation of repeated recurrences of circulatory insufficiency, complexity of diagnostic search.