АНАЛИЗ ВАРИАБЕЛЬНОСТИ СЕРДЕЧНОГО РИТМА У БОЛЬНЫХ С ХРОНИЧЕСКИМ МИОКАРДОМ

Work Objective: To assess the heart rate variability (HRV) in patients with chronic myocarditis (CM). Material and methods. To assess the state of the autonomic nervous system and to analyze heart rate variability. A survey was conducted of 15 patients with Chronic Myocarditis (CM), and a control group of 18 healthy subjects. They were divided into 2 groups. Group 1 consisted of 15 patients with Chronic Myocarditis (CM) (mean age 35,01 ± 1,0 years); the second control group consisted of 18 people (mean age 32,61 ± 1,1 years). All of them were conducted Holter study of ECG and Echocardiography. Results. The study was carried out in the morning at least 2 hours after meals. The average number of heartbeats (HR) was highest in patients with myocarditis and amounted to 77,1 ± 6,5 beats/min compared with the control group – 60,1 ± 2,4 beats/min (p < 0,001). Also a significant decrease in the power of the HRV spectrum in the low (HR) and high (HP) frequencies compared with healthy individuals (p < 0,001) was revealed. Our findings suggest that in patients with Chronic myocarditis (CM) HRV reduction compared to the control group is associated with dilation of the left ventricular cavity (LV) and manifestations of the severity of heart failure (HF). Conclusion. The decrease of heart rate variability and changes in the characteristics of the processes of myocardial remodeling, the structural condition of the heart, manifested by dilation, volume overload and reduction of contractile ability of myocardium of the left ventricle.