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ISSN 1812-7231 Klin.inform.telemed. Volume 10, Issue 11, 2014, Pages 39–44


S. A. S. Belal, A. V. Martynenko, M. I. Yabluchansky


V. N. Karazin Kharkiv National University, Ukraine

Article title

Heart rate entropy for rhythmic breathing tests

Abstract (resume)

Introduction. The study of heart rate variability (HRV) records in repeated physiological tests in healthy volunteers and cardiac patients has considerable interest. In this case dynamics of changes in physiological responses of HRV, adaptation to repeated tests, presence or absence effects of extension and training can be traced.

Purpose. Building an effective assessment of HRV dynamics in successive tests in healthy volunteers and patients with somatoform vegetative dysfunction (SVD).

Materials and methods. New definition of local entropy which unlike the traditional paired distances measures uses local rotations measure that provides a robust procedure for evaluation of short recordings of HRV is introduced in this paper.

Conclusion. New procedure for calculating the entropy of heart rhythm that can effectively analyze changes of the HRV dynamics in the series of physiological tests in healthy volunteers and cardiac patients is proposed in this paper. In the analysis of successive sessions of rhythmic breathing was found: the entropy of heart rate in the SVD group significantly lower than in healthy volunteers and in the SVD group the mechanisms of heart rate adaptation to the effects of rhythmic breathing is disrupted.


Heart rate variability, Entropy, Rhythmic breathing, Healthy volunteers, Somatoform autonomic dysfunction


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