[The wave structure of the stroke volume and RR-interval oscillations in the low wave range of the heart rhythm].
The spectral power of the RR-intervals and stroke volume (SV) oscillations in the range of 0.04-0.15Hz was estimated among 252 men aged 17-28. The maximum peak frequencies of RR-intervals spectrums and SV were significantly increased by loadings. There is a tendency to higher frequency of RR-intervals spectrum peaks in comparison with SV spectrum peaks. There are two waves on the diagram RR-intervals spectrum power at the state of rest and at tilt test testifying about two mechanisms of their formation. All the waves are in the range of 0.06-0.12Hz for RR-intervals and 0.05-0. 11 Hz for SV.
Kovalenko
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Tokar
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D000293:Adolescent; D000328:Adult; D002307:Cardiography, Impedance; D004562:Electrocardiography; D005080:Exercise Test; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008297:Male; D009200:Myocardial Contraction / Q000502:physiology*; D013318:Stroke Volume / Q000502:physiology*