Method of Intermittent Normobaric Hypoxic Low-intensity Treadmill Training for Сardiac Rehabilitation of Patients after Coronary Artery Bypass Grafting

Abstract

Aim. To develop a method of intermittent normobaric hypoxic low-intensity treadmill training for cardiac rehabilitation of patients inthe early postoperative stage after coronary artery bypass grafting. To assess the risks cardiovascular system (CVS) complications inusing the method. Material and methods. The study involved 44 patients (10 women aged 50 to 73 years and 34 men aged 40 to 71 years) with coronaryheart disease who underwent coronary artery bypass grafting. For cardiac rehabilitation, hypoxic gas mixtures were used, supplied tothe patient for breathing through an oxygen mask in combination with low-intensity training on the ReaTerra treadmill. To assess therisks of CVS complications when applying the method, we used the APKO-8-RIC oscillometric analyzer for cardiac output and bloodpressure parameters. The Robinson indices, endurance coefficient, Kerdo vegetative index, CVS adaptive potential index were calculated.Upon completion of the cardiac rehabilitation program, the subjects completed the SF – 36 Health Status Survey. Results. Studies have shown that the use of the cardiac rehabilitation method restored the level of blood pressure and heart rate,increased the Kerdo index of autonomic balance/ The Robinson index characterized the optimal work of the CVS, the endurance coefficientcharacterized the CVS endurance as satisfactory. The adaptive potential of the CVS corresponded to the physiological values ofthe norm, the activity of the heart was assessed as economical and effective, which testified to the satisfactory adaptation of patientsto the training process with the applied method. According to the questionnaire, physical and psychological components of health inpatients after a training course were qualitatively higher than before training. Conclusion. The method of intermittent normobaric hypoxytherapy in combination with low-intensity treadmill training in patients atthe early postoperative stage after coronary bypass grafting has shown high effectiveness in CVS diseases, contributing to the activationof adaptive, hemodynamic sanogenetic mechanisms, providing stimulation of rehabilitation potential in individuals of differentage groups and does not increase the risk of CVS complications.