Cardiorespiratory coupling in young healthy subjects

Physiological Measurement
Tomasz SobiechGrzegorz Gielerak

Abstract

To quantify the presence of cardiorespiratory interaction in a group of 41 healthy subjects performing a subset of the Ewing test battery. We measure the empirical distribution of the cardiorespiratory coupling time (RI), defined as the time from inspiration onset to R peaks in the ECG. The study protocol is a subset of the Ewing test battery. The respiratory function was measured with a thoracic belt and heart rate was obtained from a two channel ECG measurement. Both series of fiducial points were determined using custom software. Additionally, we determine the presence of cardiorespiratory coupling (CRC) and cardiorespiratory interaction (CRI) using Shannon entropy, synchrograms and coordigrams. We observe that the RI distribution is asymmetric and nonuniform. These features are a manifestation of the causal relation between heart action and respiration. The preceding R peak strongly affects a position of inspiration onset. From the asymmetry of the RI distribution we conclude that this relation is stronger than the relation between inspiration onset and the following R peak. We use a suitable choice of surrogate data to prove that the result cannot be falsified. We observe a dual structure of the RI histograms, which may be...Continue Reading

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Citations

Nov 2, 2018·Journal of Applied Physiology·Rohan JoshiPeter Andriessen
Feb 26, 2019·Frontiers in Physiology·Marcel Młyńczak, Hubert Krysztofiak
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Feb 7, 2020·Neuroscience and Biobehavioral Reviews·Vojislav MaricJyoti Mishra

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