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Type: Journal article
Title: Joint symbolic analyses of heart rate, blood pressure, and respiratory dynamics
Author: Baumert, M.
Javorka, M.
Kabir, M.
Citation: Journal of Electrocardiology, 2013; 46(6):569-573
Publisher: Churchill Livingstone Inc Medical Publishers
Issue Date: 2013
ISSN: 0022-0736
Statement of
Mathias Baumert, Michal Javorka, Muammar M. Kabir
Abstract: <h4>Introduction</h4>The dynamics of cardiovascular variables are modulated by respiration. The aim of this study was to assess baroreflex function in normal subjects based on the joint symbolic dynamics of heart rate, blood pressure and respiration.<h4>Methods</h4>ECG, continuous blood pressure and respiration were recorded in ten healthy subjects during rest in the supine position and upon standing. Beat-to-beat time series of heart rate, systolic blood pressure and respiratory phase were extracted and transformed into binary symbol sequences. Words of length two that were reflective of baroreflex activity were statistically analysed with respect to the respiratory phase.<h4>Results</h4>Symbolic analysis showed a significant influence of the respiratory phase on the occurrence of baroreflex patterns. Upon standing, the frequency of baroreflex words increased and the effect of respiration appeared to be reduced.<h4>Conclusions</h4>Symbolic dynamics provide a simple representation of cardiovascular dynamics and may be useful for assessing baroreflex function.
Keywords: Baroreflex; Heart rate variability; Blood pressure variability; Symbolic dynamics
Rights: Copyright © 2013 Elsevier Inc. All rights reserved.
RMID: 0020133031
DOI: 10.1016/j.jelectrocard.2013.07.009
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Appears in Collections:Electrical and Electronic Engineering publications

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