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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. In: 35th Annual International Conference of the IEEE EMBS, pp. 7294-7297. 35th Annual International Conference of the IEEE EMBS, 3 - 7 July, 2013, Osaka, Japan.

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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/85116/
Document Type:Conference or Workshop Item (Speech)
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, E.UNSPECIFIEDUNSPECIFIED
Deliere, Q.UNSPECIFIEDUNSPECIFIED
Diedrich, A.UNSPECIFIEDUNSPECIFIED
Pattyn, N.UNSPECIFIEDUNSPECIFIED
Almorad, A.UNSPECIFIEDUNSPECIFIED
Beck, L.DLRUNSPECIFIED
Gauger, PeterPeter.Gauger (at) dlr.deUNSPECIFIED
Limper, UlrichUlrich.Limper (at) dlr.deUNSPECIFIED
Funtova, I.UNSPECIFIEDUNSPECIFIED
Baevsky, R. M.UNSPECIFIEDUNSPECIFIED
Migeotte, P-F.UNSPECIFIEDUNSPECIFIED
Tank, JensCharite, BerlinUNSPECIFIED
Date:2013
Journal or Publication Title: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
Page Range:pp. 7294-7297
Status:Published
Keywords:impedance cardiography, ballistocardiography, parabolic flights
Event Title:35th Annual International Conference of the IEEE EMBS
Event Location:Osaka, Japan
Event Type:international Conference
Event Dates:3 - 7 July, 2013
Organizer:IEE EMBS, JSMBE
HGF - Research field:Aeronautics, Space and Transport (old), Aeronautics, Space and Transport
HGF - Program:Space (old), Space
HGF - Program Themes:W - no assignment, Research under Space Conditions
DLR - Research area:Space, Raumfahrt
DLR - Program:W - no assignment, R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):W - no assignment (old), R - Vorhaben Integrative Studien (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Space Physiology
Deposited By: Becker, Christine
Deposited On:27 Jan 2015 10:09
Last Modified:31 Jul 2019 19:42

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