Contributions to the impedance cardiogram waveform

Janusz Kosicki; Li hua Chen; Russell Hobbie; Robert Patterson; Eugene Ackerman

doi:10.1007/BF02364649

Contributions to the impedance cardiogram waveform

Janusz Kosicki, Li hua Chen, Russell Hobbie, Robert Patterson, Eugene Ackerman

Physical Medicine & Rehabilitation

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

We have developed a cylindrically symmetric model with which to study what physiologic variables might contribute to the impedance cardiogram signal. We find the major contributions in this model to be due to dilation of the aorta and carotid arteries, changes in conductivity of blood in these same vessels due to red cell reorientation during flow, changes in the conductivity of the lungs, and changes in heart volume. The calculations suggest that the popular equation used to determine stroke volume from thoracic impedance data is not accurate under all conditions of the circulatory system.

Original language	English (US)
Pages (from-to)	67-80
Number of pages	14
Journal	Annals of Biomedical Engineering
Volume	14
Issue number	1
DOIs	https://doi.org/10.1007/BF02364649
State	Published - Jan 1986

Keywords

Cardiac output
Impedance cardiography
Modelling

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1007/BF02364649

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AU - Patterson, Robert

AU - Ackerman, Eugene

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N2 - We have developed a cylindrically symmetric model with which to study what physiologic variables might contribute to the impedance cardiogram signal. We find the major contributions in this model to be due to dilation of the aorta and carotid arteries, changes in conductivity of blood in these same vessels due to red cell reorientation during flow, changes in the conductivity of the lungs, and changes in heart volume. The calculations suggest that the popular equation used to determine stroke volume from thoracic impedance data is not accurate under all conditions of the circulatory system.

AB - We have developed a cylindrically symmetric model with which to study what physiologic variables might contribute to the impedance cardiogram signal. We find the major contributions in this model to be due to dilation of the aorta and carotid arteries, changes in conductivity of blood in these same vessels due to red cell reorientation during flow, changes in the conductivity of the lungs, and changes in heart volume. The calculations suggest that the popular equation used to determine stroke volume from thoracic impedance data is not accurate under all conditions of the circulatory system.

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KW - Impedance cardiography

KW - Modelling

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Contributions to the impedance cardiogram waveform

Abstract

Keywords

UN SDGs

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