This study reveals the clinical value of the parameter of the total power of the heart in assessing the functional state of the patient. The article is devoted to the expediency of using the method of short recording of heart rhythm variability in Objective Structured Clinical Examination. The purpose of the study was to investigate the total power in patients with noncommunicable diseases based on the results of recording a short record of heart rhythm variability as a promising parameter for assessing the functional state during an Objective Structured Clinical Examination. Materials and methods. An analysis of the total power was carried out based on the data of the short record of heart rhythm variability in 229 people. 43 persons were comorbid patients with coronary heart disease, 111 persons were young functionally healthy non-athletes, 75 persons were professional young athletes. Results. The diagnostic value of the parameter of the total power of the heart was proved. 23% and 21% of patients with non-stationary heart rhythm in the background and orthostatic modes were found. A decrease in total power of various degrees was established in patients, in contrast to control groups. Conclusions. 1) The total power of cardiac activity is a promising, diagnostically valuable parameter for assessing the patient's functional state during an Objective Structured Clinical Examination. 2) Now all the conditions have been formed for the widespread introduction of the method of short recording of heart rhythm variability in the practice of internal medicine doctors.3) The method of short recording of heart rhythm variability can be recommended for use in the clinical examination of patients as a device for improving the individual work of a doctor in order to determine the individual characteristics of the functioning of the heart, determine the risk of cardiac death, and early preclinical diagnosis of emerging pathology.

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Cardiovascular diseases are still ranking the leading position among the commonest disabling diseases and the causes of mortality. The increase in the number of cardiac surgical operations performed requires the development of effective rehabilitation measures. Due to the patient’s individual characteristics, there is a need to develop and test rehabilitation programs for patients who have undergone coronary artery bypass grafting (CABG), or valve prosthetics. The aim of the study is to determine the principal features of cardiac rehabilitation for patients after cardiac surgery and to evaluate the effectiveness of multicomponent individualized cardiac rehabilitation programs. The study was conducted at the recently opened Department of Rehabilitation and Planned Cardiology of the Poltava Regional Clinical Medical Cardiovascular Center. The study involved patients, who underwent coronary artery bypass grafting and valve prosthetics. Effective rehabilitation for patients after cardiac surgery requires determining the level of their rehabilitation potential that enables to choose the optimal pace and scope of rehabilitation measures, based on individual indicators of patients. The implementation of multicomponent cardiac rehabilitation programs with an individualized approach based on rehabilitation potential in patients after cardiac surgery significantly reduces the length of hospital staying, promotes the widening in the range of motor modes; as well as contributes to improvement of the quality of life compared to the patients after cardiac surgery who received standard rehabilitation program. Early start of rehabilitation measures in patients after surgical operations also enhances better recovery of lost functions. The 6-minute walk test at the beginning and the end of the inpatient stage treatment enables to estimate the efficiency of rehabilitation measures.