Wavelet transform analysis to assess oscillations in pial artery pulsation at the human cardiac frequency - Publication - Bridge of Knowledge

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Wavelet transform analysis to assess oscillations in pial artery pulsation at the human cardiac frequency

Abstract

Pial artery adjustments to changes in blood pressure (BP)may last only seconds in humans. Using a novelmethod called near-infrared transillumination backscattering sounding (NIR-T/BSS) that allows for the non-invasive measurement of pial artery pulsation (cc-TQ) in humans, we aimed to assess the relationship between spontaneous oscillations in BP and cc-TQ at frequencies between 0.5 Hz and 5 Hz. We hypothesized that analysis of very short data segments would enable the estimation of changes in the cardiac contribution to the BP vs. cc-TQ relationship during very rapid pial artery adjustments to external stimuli. BP and pial artery oscillations during baseline (70 s and 10 s signals) and the response to maximal breath-hold apnea were studied in eighteen healthy subjects. The cc-TQ was measured using NIR-T/BSS; cerebral blood flow velocity, the pulsatility index and the resistive index were measured using Doppler ultrasound of the left internal carotid artery; heart rate and beat-to-beat systolic and diastolic blood pressure were recorded using a Finometer; end-tidal CO2 was measured using a medical gas analyzer. Wavelet transform analysis was used to assess the relationship between BP and cc-TQ oscillations. The recordings lasting 10 s and representing 10 cycles with a frequency of ~1 Hz provided sufficient accuracy with respect to wavelet coherence and wavelet phase coherence values and yielded similar results to those obtained from approximately 70 cycles (70 s). A slight but significant decrease in wavelet coherence between augmented BP and cc-TQ oscillations was observed by the end of apnea. Wavelet transform analysis can be used to assess the relationship between BP and cc-TQ oscillations at cardiac frequency using signals intervals as short as 10 s. Apnea slightly decreases the contribution of cardiac activity to BP and cc-TQ oscillations.

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Authors (12)

  • Photo of Paweł J. Winklewski

    Paweł J. Winklewski

    • Gdański Uniwersytet Medyczny Zakład Fizjologii Człowieka
  • Photo of Marcin Gruszecki

    Marcin Gruszecki

    • Gdański Uniwersytet Medyczny Katedra Medycyny Nuklearnej i Informatyki Radiologicznej
  • Photo of Jacek Wolf

    Jacek Wolf

    • Gdański Uniwersytet Medyczny Katedra Nadciśnienia Tętniczego i Diabetologii
  • Photo of Ewa Świerblewska

    Ewa Świerblewska

    • Gdański Uniwersytet Medyczny Katedra Nadciśnienia Tętniczego i Diabetologii
  • Photo of Katarzyna Kunicka

    Katarzyna Kunicka

    • Gdański Uniwersytet Medyczny Katedra Nadciśnienia Tętniczego i Diabetologii
  • Photo of Magdalena Wszędybył-Winklewska

    Magdalena Wszędybył-Winklewska

    • Gdański Uniwersytet Medyczny Zakład Fizjologii Człowieka
  • Photo of dr inż. Wojciech Gumiński

    Wojciech Gumiński dr inż.

  • Photo of J. Zabulewicz

    J. Zabulewicz

    • Gdański Uniwersytet Medyczny Zakład Fizjologii Człowieka
  • Photo of Andrzej F. Frydrychowski

    Andrzej F. Frydrychowski

    • Gdański Uniwersytet Medyczny Zakład Fizjologii Człowieka
  • Photo of Leszek Bieniaszewski

    Leszek Bieniaszewski

    • Gdański Uniwersytet Medyczny Katedra Nadciśnienia Tętniczego i Diabetologii
  • Photo of Krzysztof Narkiewicz

    Krzysztof Narkiewicz

  • Photo of Krzysztof Narkiewicz

    Krzysztof Narkiewicz

    • Gdański Uniwersytet Medyczny Katedra Nadciśnienia Tętniczego i Diabetologii

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Category:
Articles
Type:
artykuł w czasopiśmie wyróżnionym w JCR
Published in:
MICROVASCULAR RESEARCH no. 99, pages 86 - 91,
ISSN: 0026-2862
Language:
English
Publication year:
2015
Bibliographic description:
Winklewski P., Gruszecki M., Wolf J., Świerblewska E., Kunicka K., Wszędybył-Winklewska M., Gumiński W., Zabulewicz J., Frydrychowski A., Bieniaszewski L., Narkiewicz k.: Wavelet transform analysis to assess oscillations in pial artery pulsation at the human cardiac frequency// MICROVASCULAR RESEARCH. -Vol. 99, (2015), s.86-91
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.mvr.2015.03.003
Verified by:
Gdańsk University of Technology

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