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Timing and source of the maximum of the transthoracic impedance cardiogram (dZ/dt) in relation to the H-I-J complex of the longitudinal ballistocardiogram under gravity and microgravity conditions

Luchitskaya, E and Deliere, Q and Diedrich, A and Pattyn, N and Almorad, A and Beck, L. and Gauger, Peter and Limper, Ulrich and Funtova, I and Baevsky, R.M. and Migeotte, P-F. and Tank, Jens (2013) Timing and source of the maximum of the transthoracic impedance cardiogram (dZ/dt) in relation to the H-I-J complex of the longitudinal ballistocardiogram under gravity and microgravity conditions. International Conference of the IEEE EMBS. ISSN 978-1-4577-0216-7/13/$26.00 ©2013 IEEE

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Official URL: http://www.safetylit.org/week/journalpage.php?jid=6761

Abstract

The transthoracic impedance cardiogram (ICG) and the acceleration ballistocardiogram (BCG) measured close to the center of mass of the human body are generated by changes of blood distribution. The transthoracic ICG is an integrated signal covering the whole thorax and spatial resolution is poor. Comparison between both signals can be used to elucidate the source of the ICG signal. We recorded the ECG, ICG, and BCG simultaneously in healthy subjects under resting and microgravity conditions during parabolic flights. The time interval between the R-peak of the ECG and the maximum of the ICG (R-dZ/dtmax) and the time interval between the R-peak of the ECG and the I-peak in the BCG (RI) differed significantly (p<0.0001). The I-peak in the BCG always occurred earlier during systole than dZ/dtmax. The delay of dZ/dtmax ranged between 23 and 28 ms at rest and was lowest under microgravity conditions (12±4 ms, p<0.02). Our results suggest that both signals have different sources. Combination of modern imaging techniques with classical non invasive approaches to detect changes of blood distribution may provide new insights into the complex interaction between blood flow and mechanocardiographic signals like the BCG.

Item URL in elib:https://elib.dlr.de/87970/
Document Type:Proceedings
Title:Timing and source of the maximum of the transthoracic impedance cardiogram (dZ/dt) in relation to the H-I-J complex of the longitudinal ballistocardiogram under gravity and microgravity conditions
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Luchitskaya, EUNSPECIFIEDUNSPECIFIED
Deliere, QUNSPECIFIEDUNSPECIFIED
Diedrich, Aandre.diedrich (at) vanderbilt.eduUNSPECIFIED
Pattyn, NUNSPECIFIEDUNSPECIFIED
Almorad, AUNSPECIFIEDUNSPECIFIED
Beck, L.DLRUNSPECIFIED
Gauger, PeterPeter.Gauger (at) dlr.deUNSPECIFIED
Limper, UlrichUlrich.Limper (at) dlr.deUNSPECIFIED
Funtova, IUNSPECIFIEDUNSPECIFIED
Baevsky, R.M.UNSPECIFIEDUNSPECIFIED
Migeotte, P-F.pierre-francois.migeotte (at) elec.rma.ac.beUNSPECIFIED
Tank, JensFranz-Volhard Clinical Research Center, Medical University Charité, Campus Buch, Berlin, GermanyUNSPECIFIED
Date:July 2013
Journal or Publication Title:Proceedings 35th Annual International Conference of the IEEE EMBS
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:4
Editors:
EditorsEmail
UNSPECIFIEDIEEE (Institute of Electrical and Electronics Engineers)
Series Name:International Conference of the IEEE EMBS
ISSN:978-1-4577-0216-7/13/$26.00 ©2013 IEEE
Status:Published
Keywords:impedance cardiography, ballistocardiography, microgravity
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Beschleunigungsinduzierte Effekte (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Space Physiology
Deposited By: Becker, Christine
Deposited On:04 Feb 2014 08:54
Last Modified:31 Jul 2019 19:45

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