Abstract
The spectral analysis technique was applied for noninvasive assessment of heartrate baroreflex sensitivity. The modulus (or gain) of the transfer function between variations in blood pressure and heart rate was calculated. During voluntarily controlled breathing intervals (3,4,5, 6,8,10 and 17 s), the amplitude of 0.1 Hz and respiratory peaks in spectra of heart rate and blood pressure changed markedly. Nevertheless, the average sensitivity of the baroreflex (modulus) changed insignificantly. The difference between the modulus at 0.1 Hz and at breathing rate indicates that baroreflex is only one of the factors causing respiratory arrhythmia.
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Honzíková, N., Fišer, B. (1991). Spectral Analysis of Circulatory Rhythms and Baroreflex Sensitivity in Man. In: Haken, H., Koepchen, H.P. (eds) Rhythms in Physiological Systems. Springer Series in Synergetics, vol 55. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-76877-4_7
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DOI: https://doi.org/10.1007/978-3-642-76877-4_7
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