Abstract
In the research, 13-17 year old adolescents born in Magadan Region underwent an active orthostatic test (AOT) to study changes of their heart rate variability (HRV) and autonomic reactivity (AR). Optimal values of HRV that corresponded to the range of 25th and 75th percentile were found to be significantly greater in vagotonia subjects than in normotonia ones and moreover as compared to sympathotonia subjects. The greatest number of reliable changes in HRV parameters was revealed in vagotonia adolescents between the 14 and 15-year-old groups. In the age-related dynamics, these features are associated with an increase in the influence of the autonomic regulation contour on the heart rhythm. HRV indices did not practically change under normo- and sympathotonia and no directed dynamics were observed. In response to AOT, only about 40 % of the examinees have an optimal level of reactivity with the balance of the ANS links. Adolescents with other types of ANS reactivity may be at risk with a high probability of adaptation disorders, which requires careful medical examination in their preventive care.
Published Version
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