To the question of terminology in the biomechanics of the blood circulation: the concepts of compensation, subcompensation and decompensation

А gradation of violations of cardiac and vascular activity based on quantitative and qualitative changes in the parameters of blood circulation biomechanics is proposed. The study included data on the analysis and interpretation of biomechanical parameters of the cardiovascular system of 130 people, including healthy people and those with the most common risk factors of atherosclerosis. With the help of instrumental methods of research, in the examined subjects the indicators of biomechanics of the heart, main arteries, small and large circles of blood circulation. The article deals with the problems of gradation of degrees of compensation for disorders of blood circulation biomechanics. By analyzing and interpreting the results of a complex instrumental study of biomechanical parameters of the cardiovascular system in persons with major risk factors of atherosclerosis, the author introduces the concept of "compensation", "subcompensation" and "decompensation" of blood circulation biomechanics, their criteria are determined. The author emphasizes the need to allocate degrees of violations of compensation of the biomechanics of blood circulation and the use of a consistent deterioration in the functioning of the cardiovascular system to predict further development of the disease, early selection of patients for in-depth study of the status of their cardiovascular system and the solution of the question of a possible correction of disorders of the biomechanical properties of the heart and blood vessels. The analysis of biomechanical parameters of all departments of cardiovascular system allowed us to determine gradation of degrees of compensation of biomechanics of blood circulation. The approach to the classification of quantitative disorders of biomechanical parameters of blood circulation, proposed in this article, will facilitate the process of analyzing the results obtained in the mathematical treatment of apexcardiogram curves, sphygmograms and rheograms and interpretation of violations of the biomechanics of the cardiovascular system.