Echocardiography is one of the main diagnostic methods in cardiology. It is used on an outpatient basis and in a hospital, including in operating rooms, intensive care units. Currently, much attention is paid to the development and implementation in clinical practice of recommendations for the diagnosis and management of patients with various diseases, the purpose of which is to give the doctor a "guiding thread in the sea of ​ ​ modern research" and thereby improve the diagnosis and treatment of diseases, increase the duration and improve the quality of life of patients. In recent years, a large number of international recommendations have been issued on various private issues of echocardiography, but general recommendations on the clinical use of echocardiography have not been reprinted for a long time. This book discusses the basics of obtaining, evaluating and analyzing echocardiographic data. Particular attention is paid to their practical use, the impact on the choice of tactics for managing patients with various diseases of the heart and blood vessels. The book contains a large amount of illustrative material and clinical examples.