Parameters of spectral analysis of heart rate variability in rats

Chizh, Nikolay A.

doi:10.15407/cryo25.03.235

Cited by 8 publications

(3 citation statements)

References 29 publications

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“…High-frequency HF-waves are closely related to the act of breathing, therefore the range of this component in humans is 0.4-0.15 Hz (Table 1), which corresponds to 9-24 oscillations (respiratory movements per minute) [4]. In small mammals (rats) this range is 0.8-3 Hz (48-180 oscillations per minute) in the waking state [12,13]. With shallow irregular breathing, the peak of HF waves is "blurred", but at regular breathing, it corresponds to the frequency of breathing [13].…”

Section: Resultsmentioning

confidence: 99%

“…ECG was recorded during 5 min with Poly-Spectrum 8/V and Poly-Spectrum 12 hardwaresoftware using Poly-Spectrum-Rhythm software version 4.8 (all -Neurosoft, Russia) in standard (I, II, III) and additional (avL, avR and avF) leads. The parameters of the spectral analysis of HRV in rats were equal to those previously de termined: TP -0.015-3 Hz; VLF -0.015-0.04 Hz); LF (0.05-0.79 Hz); HF (0.8-3 Hz) [12], the results of analysis in humans, are described in "Standards" [5]. The influence rate of postural loads on HRV was assessed according to ECG data in wedge (supine), ortho-(vertical -with head up) or anti-orthostatic-(with head down) body positions.…”

Section: Methodsmentioning

confidence: 99%

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Physiological interpretation of heart rate variability spectral analysis data

Chizh¹

2019

Fiziol Zh

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Despite the widespread use of the spectral analysis of heart rate variability (HRV) in biology and medicine, today questions about the physiological interpretation of frequency ranges remain unsolved. The combined recording of the electrocardiogram and registration of the amplitude and frequency of displacement of the chest during breathing allowed us to estimate the contribution of the act of breathing on HRV in the HF range and to determine the leading role of mechanical contraction of the diaphragm in the formation of respiratory arrhythmia. We also determined experimentally that, depending on the frequency and strength of the mechanical effect on the aorta of animals, it is possible to obtain corresponding peaks in the spectrogram. In humans, a test with swallowing at varying the frequency of swallowing allows obtaining a peak in any area of the spectrogram. The results obtained with the contraction of the muscles of the anterior abdominal wall indicate the effect of a rhythmic increase in intra-abdominal pressure on the formation of the spectrum. Based on the obtained results, we can assume that the peaks in the LF-range, not related to the arterial pressure waves, are due to the mechanical effect on the aorta of the peristaltic waves of the digestive tract organs. The results of studies, conducted when changing the position of the body in space, showed that hydrodynamic changes in the venous system largely determine the very slow-wave component of the spectrum.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Physiological interpretation of heart rate variability spectral analysis data

Chizh¹

2019

Fiziol Zh

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“…Such an approach is understandable given that no standard reference values for HRV in rats have been reported. Chizh (2015) also draws attention to this problem, where he points out the difference in the frequency ranges of various authors, from which spectral components were evaluated. This reflects the considerable variability in baseline or control values at the evaluation of the frequency-domain or time-domain HRV parameters themselves.…”

Section: Introductionmentioning

confidence: 99%

Heart rate variability in male rats

Švorc,

Grešová,

Švorc

2023

Physiological Reports

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The cardiovascular system is primarily controlled by the autonomic nervous system, and any changes in sympathetic or parasympathetic activity also have an impact on myocardial activity. Heart rate variability (HRV) is a readily available metric used to assess heart rate control by the autonomic nervous system. HRV can provide information about neural (parasympathetic, sympathetic, reflex) and humoral (hormones, thermoregulation) control of myocardial activity. Because there are no relevant reference values for HRV parameters in rats in the scientific literature, all experimental results are only interpreted on the basis of changes from currently measured control or baseline HRV values, which are, however, significantly different in individual studies. Considering the significant variability of published HRV data, the present study focused primarily on comparing control or baseline HRV values under different conditions in in vivo experiments involving rats. The aim of the study was therefore to assess whether there are differences in the starting values before the experiment itself.

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Effect of Direct and Mediated through Maternal Organism Activation of the Catecholaminergic System on Heart Rate Parameters in Rat Fetuses

Vdovichenko,

Nikonorova

2024

Bull Exp Biol Med

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Parameters of spectral analysis of heart rate variability in rats

Cited by 8 publications

References 29 publications

Physiological interpretation of heart rate variability spectral analysis data

Physiological interpretation of heart rate variability spectral analysis data

Heart rate variability in male rats

Effect of Direct and Mediated through Maternal Organism Activation of the Catecholaminergic System on Heart Rate Parameters in Rat Fetuses

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