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Abstract <p>This article reviews the concepts of cardiovascular homeostasis regulatory mechanisms during space flight (SF) and heart rate variability (HRV) as a biomarker of homeostatic processes in the human body. HRV, which represents fluctuations in the time intervals between heartbeats, is determined by dynamic nonlinear processes of the autonomic nervous system (ANS), neurohumoral, and metabolic regulatory circuits. According to this, HRV can quickly respond to changes in the blood supply needs, being a qualitative indicator of the level of adaptation to various environmental conditions. HRV is associated not only with ANS, but also with brain structures, including the prefrontal cortex. This association makes HRV even more significant as a complex biomarker reflecting not only cardiac function, but also flexible adaptive regulation in SF, allowing assessment of both condition of the cardiovascular system and the general functional state of the body.</p>

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Heart Rate Variability as a Marker of Regulatory Mechanisms of Cardiovascular Homeostasis in Space Flight

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • V. B. Rusanov,
  • Yu. D. Yakhya,
  • O. I. Orlov

摘要

Abstract

This article reviews the concepts of cardiovascular homeostasis regulatory mechanisms during space flight (SF) and heart rate variability (HRV) as a biomarker of homeostatic processes in the human body. HRV, which represents fluctuations in the time intervals between heartbeats, is determined by dynamic nonlinear processes of the autonomic nervous system (ANS), neurohumoral, and metabolic regulatory circuits. According to this, HRV can quickly respond to changes in the blood supply needs, being a qualitative indicator of the level of adaptation to various environmental conditions. HRV is associated not only with ANS, but also with brain structures, including the prefrontal cortex. This association makes HRV even more significant as a complex biomarker reflecting not only cardiac function, but also flexible adaptive regulation in SF, allowing assessment of both condition of the cardiovascular system and the general functional state of the body.