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Nonstationary Heart Rate Variability during the Head-Down Tilt Test

  • COMPLEX SYSTEMS BIOPHYSICS
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Abstract—A new method has been proposed for processing the nonstationary rhythmogram signal recorded in the head-down tilt test (HDT). The method is based on the continuous wavelet transform of the heart rate signal with a frequency modulation component. The rhythmogram signal was shown to be a system of heart rhythm bursts of different frequency ranges. Quantitative indices were developed to analyze the system of bursts. The translational signal transfer method was used to eliminate the boundary effects that arise in analyses of the low-frequency components of the rhythmogram signal.

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Funding

This work was supported by the Russian Foundation for Basic Research (project no. 18-32-20022_mol_a_ved).

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Authors and Affiliations

  1. Peter the Great St. Petersburg Polytechnic University, 195251, St. Petersburg, Russia

    S. V. Bozhokin & K. A. Barantsev

  2. Kirov Military Medical Academy, 194044, St. Petersburg, Russia

    E. M. Lesova & V. O. Samoilov

Authors
  1. S. V. Bozhokin
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  2. E. M. Lesova
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  3. V. O. Samoilov
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  4. K. A. Barantsev
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Corresponding author

Correspondence to S. V. Bozhokin.

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Conflict of interests. The authors declare that they have no conflict of interest.

Statement of compliance with standards of research involving humans as subjects. All procedures performed in studies involving human participants were in accordance with the ethical standards of the 1964 Helsinki Declaration and its later amendments. Informed consent was voluntarily given by all individual participants involved in the study.

Additional information

Translated by T. Tkacheva

Abbreviations: HDT, head-down test; LF, low frequency; HF, high frequency; FMS, frequency-modulated signal; DCWT, double continuous wavelet transform.

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Bozhokin, S.V., Lesova, E.M., Samoilov, V.O. et al. Nonstationary Heart Rate Variability during the Head-Down Tilt Test. BIOPHYSICS 65, 151–158 (2020). https://doi.org/10.1134/S0006350920010029

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  • DOI: https://doi.org/10.1134/S0006350920010029

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