HEART RATE VARIABILITY IN HEALTHY 18-27 YEARS-OLD WOMEN AND MEN IN THE KHANTY-MANSI AUTONOMOUS OKRUG - UGRA

Abstract

Aim: To verify reference values of the heart rate variability (HRV) parameters among healthy 18-27-year olds in the Khanty-Mansi autonomous okrug - Ugra, Eastern Siberia. Methods: Data were collected in series of observational analytical cross-sectional studies between 2006 and 2020. The sample consisted of 13269 subjects - 7442 women and 5827 men aged 18 to 27 years permanently living in Khanty-Mansi autonomous okrug. We studied parameters of background HRV on short-term recordings in the time and frequency domains, Poincare graph and cardiointervalography by R. M. Baevsky. For all HRV parameterswe assessed minimal and maximal values as well as the 3rd, 10th, 25th, 50th, 75th, 90th and 97th percentile. Gender differences in all studied variables were studied using Mann-Whitney tests after normality testing using Kolmogorov-Smirnov tests with Lilliefors correction. Results: We observed significant differences between central tendencies of all studied HRV parameters between women and men (p < 0.01) with the exception of the relative power of the spectrum in the very low frequency range - an indicator of the adequacy of the regulation processes and the vegetative rhythm indicator. Conclusions: The reference values of the HRV parameters for young adults living in the Khanty-Mansi Autonomous Okrug-Ugrawere verified. Significant gender differences in all the studied HRV parameters were observed except one, which is considered to be an indicator of the adequacy of the regulation processes and the vegetative rhythm indicator. We also discuss applying centile values of the relative spectral power of HRV to identify categories of heart rate modulation.