Wavelet analysis of oscillations in the peripheral blood circulation measured by laser Doppler technique

Stefanovska, Aneta and Bracic, Maja and Kvernmo, Hebe Désirée (1999) Wavelet analysis of oscillations in the peripheral blood circulation measured by laser Doppler technique. IEEE Transactions on Biomedical Engineering, 46 (10). pp. 1230-1239. ISSN 0018-9294

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Abstract

The wavelet transform technique, a time-frequency method with logarithmic frequency resolution, was used to analyze oscillations in human peripheral blood flow measured by laser Doppler flowmetry. The oscillations extended over a wide frequency scale and their periods varied in time. Within the frequency range studied, 0.0095-1.6 Hz, five characteristic oscillations were revealed, arising from both local and central regulatory mechanisms. After the insertion of endothelium-dependent and endothelium-independent vasodilators the spectra of blood flow markedly differed in the frequency interval 0.0095-0.02 Hz. In this way it was demonstrated thai endothelial activity is a rhythmic process that contributes to oscillations in blood flow with a characteristic frequency of around 0.01 Hz. The study illustrates the potential of laser Doppler flowmetry combined with dynamical systems analysis for studies of both the micro- and macroscopic mechanisms of blood flow regulation in vivo.

Item Type:
Journal Article
Journal or Publication Title:
IEEE Transactions on Biomedical Engineering
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2204
Subjects:
ID Code:
148570
Deposited By:
Deposited On:
09 Nov 2020 13:40
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Dec 2020 08:23