Highlights. The article is a review of current literary data on the problem of acute decompensated heart failure. The review highlights the basic principles of the diagnosis and treatment, as well as the problems of their implementation into clinical practice.Abstract Acute decompensated heart failure (ADHF) is a life-threatening condition that requires an emergency hospitalization for intensive treatment. Moreover, it is the event that worsens the patient's further prognosis. Frequent rehospitalizations for decompensation of heart failure reduce life expectancy and quality, and are also a significant economic problem in practical health care. The increasing number of patients with heart failure leads to the growing number of patients seeking medical help for acute decompensated heart failure. More than half of the patients are re-hospitalized within a year for the same reason. The predicted increase in the prevalence of CHF worldwide makes the management of such patients a global medical and social problem. Patients delay, low compliance and insufficient ambulatory monitoring are the factors that need to be influenced in order to improve the prognosis. The article is a review of literary data on the epidemiology of ADHF, diagnosis, treatment and outpatient observation of patients with acute decompensated heart failure. The problems of compliance, the prospects for modern methods of remote monitoring and the possibilities of new drugs are discussed in the article.