Wave Structure of Heart Rhythm During Tilt Test for Persons with Different Levels of Vegetative Tonus
Main Article Content
Abstract
Introduction. It is known that there are typological features among healthy young people according to the level of autonomic tone. Accordingly, there are groups of sympatho-, normo- and vagotonics. Work has been carried out to study the influence of the initial level of autonomic tone on the reactions of the cardiovascular system in respiratory hypocapnia, pulsed ophthalmic photostimulation, in different phases of the biological cycle for women. However, there is no work on the analysis of changes in the wave structure of heart rate depending on the initial level of autonomic tone.
Purpose. The aim was to determine the features of the wave structure of the heart rhythm during orthoprobe for healthy young men with different levels of tone of the autonomic nervous system at rest.
Methods. Measurements were performed in conditions close to the main exchange. 117 healthy young men aged 18-23 years were examined in compliance with the requirements of bioethics. Three main spectral components were analyzed in the tRR spectrum: HF (0.15-0.4 Hz) LF (0.04-0.15 Hz); VLF (0-0.04 Hz); TP (0-0.4 Hz). The amplitude of the largest peak of the tRR spectrogram in the frequency range 0.04-0.15 Hz (aLF) and its frequency (tLF) were calculated. Normalized median spectrograms of tRR oscillations were constructed.
Results.A significant decrease in HF was observed in individuals of all three groups during orthoprobe. The median reactivity of reactivity was -67.3%, -77.5%, -77.9% for groups I, II and III, respectively. There were no differences between the groups due to the reactivity of this indicator. The reactivity of LF to changes in body position for sympathotonics was significantly different.
The frequency of the maximum peak of the spectrogram in the range of low often resting heart rate did not differ between groups. This indicator probably decreased during orthoprobe in groups II and III. It was found that the wave has two peaks in the vertical position in persons with different baseline levels of autonomic tone for vagotonics and normotonics in the frequency range from 0.04 to 0.15 Hz.
Originality. Differences in the reactivity of heart rate waves to orthoprobe for healthy young men with different baseline levels of autonomic tone were detected for the first time.
Conclusions. The greatest differences in changes in the wave structure of the heart rhythm during orthoprobe for persons with different baseline levels of autonomic tone are manifested in the range of low heart rate. Spectrum reduction reactions in this range were predominant for sympathotonics. The reactions of increasing LF and the amplitude of the maximum peak of the spectrogram were predominant for normo- and parasympathotonics. It was found that the wave has two peaks in the vertical position in persons with different baseline levels of autonomic tone for vagotonics and normotonics in the frequency range from 0.04 to 0.15 Hz.
Sympathotonics have one wave of orthopedic reactivity with maxima at 0.09 Hz in the low heart rate range. Normotonics have two waves of reactivity per orthoprobe with frequencies of 0.08 Hz and 0.11 Hz. Parasympathotonics also have two waves with frequencies of 0.07 Hz and 0.09 Hz. Prospects for further research include elucidation of the mechanisms of tRR wave formation depending on the level of vegetative tone under different conditions.
Article Details
Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
AGREEMENT ABOUT TRANSMISSION OF COPYRIGHT
I, the author of the article / We, the authors of the manuscript _______________________________________________________________________
in case of its acceptance for publication, we transfer the following rights to the founders and editorial boards of the scientific publication "Cherkasy University Bulletin: Biological Sciences Series":
1. Publication of this article in Ukrainian (English) and distribution of its printed version.
2. Dissemination of the electronic version of the article through any electronic means (placing on the official journal web site, in electronic databases, repositories, etc.). At the same time we reserve the right without consent of the editorial board and the founders:
1. Use the materials of the article in whole or in part for educational purposes.
2. To use the materials of the article in whole or in part for writing your own theses.
3. Use article materials to prepare Summarys, conference reports, and oral presentations.
4. Post electronic copies of the article (including the final electronic version downloaded from the journal's official website) to:
a. personal web-pecypcax of all authors (web sites, web pages, blogs, etc.);
b. web-pecypcax of the institutions where the authors work (including electronic institutional repositories);
with. non-profit, open-source web-pecypcax (such as arXiv.org).
With this agreement, we also certify that the submitted manuscript meets the following criteria:
1. Does not contain calls for violence, incitement of racial or ethnic enmity, which are disturbing, threatening, shameful, libelous, cruel, indecent, vulgar, etc.
2. Does not infringe the copyrights and intellectual property rights of others or organizations; contains all the references to the cited authors and / or publications envisaged by applicable copyright law, as well as the results and facts used in the article by other authors or organizations.
3. It has not been previously published in other publishers and has not been published in other publications.
4. Does not include materials that are not subject to publication in the open press, in accordance with applicable law.
____________________ ___________________
First name, Last name, signature of the author
"___" __________ 20__
References
Kovalenko, S.O. (2017). Characteristics and theoretical foundations of methods for analyzing heart rate variability. Ukrainian Journal of Medicine, Biology and Sports. [Ukrainskyi zhurnal medytsyny, biolohii ta sportu].. 2. 223–233. (In Ukr).
Kovalenko, S.O., & Kudiy, L.I. (2016). Heart rate variability. Methodical aspects. Cherkasy: Cherkasy National University. Named after B. Khmelnytsky. 300. (In Ukr).
Kovalenko, S.O. (2011). Regulatory rhythms of hemodynamics and their individual features in humans. Abstract of Doctor of Biology. Science. K. 40. (In Ukr).
Zavhorodnia, V. A., Androshchuk, O. I., Kharchenko, T. H., Kudii, L. I., & Kovalenko, S. O. (2020). Haemodynamic effects of hyperventilation on healthy men with different levels of autonomic tone. Regulatory Mechanisms in Biosystems. 11(1). 13-21. Doi: https://doi.org/10.15421/022002
Rybalko, A.V., Zavgorodnya, V.A., Kovalenko, S.O., & Kudiy, L.I. (May 28-30, 2015). Influence of the initial level of vegetative tone on the state of the cardiovascular system during pulsed ophthalmic photostimulation. Proceedings of the UI Congress of the Ukrainian Biophysical Society. Lutsk-Svityaz. 56 (In Ukr).
Lutsenko, O.I., & Kovalenko, S.O. (2017). Functional state of the cardiovascular system in women with different levels of autonomic tone. Bulletin of Cherkasy University. Series: Biological Sciences [Bulletin of Cherkasy University]. 2. 39-44.([In Ukr).
Kovalenko, S.O., Kushnirenko, O.E., & Nosenko, L.I. (2000). Software system for primary processing of cardiographic signals. Bulletin of Cherkasy University. Series: Biological Sciences. Bulletin of Cherkasy University] Cherkasy. 22. 73-78. (In Ukr).
Kovalenko, S.O., & Yakovlev, M.E.(2006). Computer program for photostimulation "Lightmaker". Author's certificate of Ukraine №16134. 529.343. (In Ukr).
Lutsenko, O.I., & Kovalenko, S.O. (2017). Blood pressure and hemodynamics: Mayer waves in different phases of ovarian and menstrual cycle in women. Physiological research. 66(2). 235-240. Doi: http://www.biomed.cas.cz/physiolres/pdf/66/66_235.pdf
Kovalenko, S.O., & Tokar, S.I. (2007). The wave structure of the stroke volume and RR-interval oscillations in the low wave range of the heart rhythm. Fiziolohichnyi Zhurnal (Kiev, Ukraine : 1994), 01 Jan 2007, 53(2):36-40 Doi: https://fz.kiev.ua/index.php?abs=595 (In Ukr).
Cevese, A. (2001). Baroreflex and oscillation of heart period at 0.1 Hz studied by alpha-blockade and cross-spectral analysis in healthy humans. J Physiol. 531(1). P.235-244.
Pokrovskii, V.M. (2003). Alternative Viev on the Mechanism of Cardiac Rhythmogenesis. Heart, Lung Circ. 12(1). 18-24.