Dynamics of heart rate variability indicators in miners with professional polyneuropathy during clinoorthostatic testing

Abstract

Introduction. Intensive development of coal mining in Kuzbass contributes to the growth of professional pathology. Production factors lead to autonomous dysregulation and damage to peripheral nerves, and the development of upper limb polyneuropathy. Analysis of heart rate variability is currently widely used to determine the features of vegetative maintenance, in the conditions of a clinoorthostatic test, it allows you to assess the safety of vegetative regulation, and makes it possible to predict the course of the disease.The aim of the study was to study the dynamics of heart rate variability in clinoorthostatic samples in miners with professional upper limb polyneuropathy to assess the nature and level of vegetative disorders.Materials and methods. Th e analysis of changes in spectral and nonlinear parameters of heart rate variability at the stages of performing an active clinoorthostatic test in 40 miners with the established diagnosis of upper limb polyneuropathy and 20 people who do not have harmful occupational factors and symptoms of polyneuropathy, who made up the control group, was carried out.Results. Th e subjects with polyneuropathy had an initial decrease in high-frequency and low-frequency spectral parameters of heart rate variability as a sign of vegetative insuffi  ciency. Th e absence of an increase in the low frequency index for a sample with active orthostasis indicates a violation of the sympathetic link reaction, reduced sensitivity of baroreceptors. Changes in the spectral index of a very low frequency of heart rate variability remained in the range of normal values at all stages of the test. Conclusions. Th e study of heart rate variability at the stages of a clinoorthostatic test allows us to determine the nature and level of violations of vegetative regulation in miners with professional polyneuropathy, as well as the possibility of compensatory mechanisms.