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Age-related differences in the morphology of the impedance cardiography signal

Journal of Electrical Bioimpedance
Volume 10 (2019): Issue 1 (January 2019)
By:
Open Access
|Dec 2019

Figures & Tables

Fig. 1

ICG plotted as change in impedance (−ΔZ), the time-derivative of the impedance (−dZ/dt) together with ECG. The B point marks the aortic valve opening, the X point marks aortic valve closure, the Y point marks pulmonic valve closure and the O point marks the rapid ventricular filling wave. The distance from the ECG Q-point to the ICG B point is attributed to the pre-ejection period of the heart (TPE), and the ICG B-X distance is attributed to the left ventricular ejection time (TLVE). The figure is copied from Bernstein 2009 under the Wikimedia Commons license.
ICG plotted as change in impedance (−ΔZ), the time-derivative of the impedance (−dZ/dt) together with ECG. The B point marks the aortic valve opening, the X point marks aortic valve closure, the Y point marks pulmonic valve closure and the O point marks the rapid ventricular filling wave. The distance from the ECG Q-point to the ICG B point is attributed to the pre-ejection period of the heart (TPE), and the ICG B-X distance is attributed to the left ventricular ejection time (TLVE). The figure is copied from Bernstein 2009 under the Wikimedia Commons license.

Fig. 2

ICG (−dZ/dt) waveforms for each beat, resampled to an even length of one second (gray lines). The ensemble averages for every individual and phase is shown in the thick black line with ±1 standard deviation in the dashed lines.
ICG (−dZ/dt) waveforms for each beat, resampled to an even length of one second (gray lines). The ensemble averages for every individual and phase is shown in the thick black line with ±1 standard deviation in the dashed lines.

Fig. 3

The ensemble averages of −dZ/dt for each individual within each phase (colored lines). The mean of these curves is shown in the thick black lines (grand ensemble averages).
The ensemble averages of −dZ/dt for each individual within each phase (colored lines). The mean of these curves is shown in the thick black lines (grand ensemble averages).

Fig. 4

The ensemble averages of −d2Z/dt2 for each individual within each phase (colored lines). The mean of these curves is shown in the thick black lines (grand ensemble averages).
The ensemble averages of −d2Z/dt2 for each individual within each phase (colored lines). The mean of these curves is shown in the thick black lines (grand ensemble averages).
DOI: https://doi.org/10.2478/joeb-2019-0020 | Journal eISSN: 1891-5469
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Language: English
Page range: 139 - 145
Submitted on: Dec 1, 2019
Published on: Dec 31, 2019
Published by: University of Oslo
In partnership with: Paradigm Publishing Services
Publication frequency: 1 times per year
Keywords:
Bioimpedance,
impedance cardiography,
age,
signal analysis
Related subjects:
Engineering,
Bioengineering and biomedical engineering,
Biomedical electronics,
Life sciences,
Biophysics,
Medicine,
Biomedical engineering,
Physics,
Spectroscopy and metrology

© 2019 Christian Tronstad, Jan Olav Høgetveit, Ole Elvebakk, Håvard Kalvøy, published by University of Oslo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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