Evidence of time-varying myocardial contribution by in vivo magnitude and phase measurement in mice

Chia Ling Wei; Jonathan W. Valvano; Marc D. Feldman; Anil Kottam; David Altman; Karthik Raghavan; Daniel J. Fernandez; Maricela Reyes; Daniel Escobedo; John A. Pearce

Evidence of time-varying myocardial contribution by in vivo magnitude and phase measurement in mice

Chia Ling Wei, Jonathan W. Valvano, Marc D. Feldman, Anil Kottam, David Altman, Karthik Raghavan, Daniel J. Fernandez, Maricela Reyes, Daniel Escobedo, John A. Pearce

Department of Electrical Engineering

Research output: Contribution to journal › Conference article › peer-review

8 Citations (Scopus)

Abstract

Cardiac volume can be estimated by a conductance catheter system. Both blood and myocardium are conductive, but only the blood conductance is desired. Therefore, the parallel myocardium contribution should be removed from the total measured conductance. Several methods have been developed to estimate the contribution from myocardium, and they only determine a single steady state value for the parallel contribution. Besides, myocardium was treated as purely resistive or mainly capacitive when estimating the myocardial contribution. We question these assumptions and propose that the myocardium is both resistive and capacitive, and its contribution changes during a single cardiac cycle. In vivo magnitude and phase experiments were performed in mice to confirm this hypothesis.

Original language	English
Pages (from-to)	3674-3677
Number of pages	4
Journal	Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Volume	26 V
Publication status	Published - 2004
Event	Conference Proceedings - 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2004 - San Francisco, CA, United States Duration: 2004 Sept 1 → 2004 Sept 5

All Science Journal Classification (ASJC) codes

Signal Processing
Biomedical Engineering
Computer Vision and Pattern Recognition
Health Informatics

Cite this

@article{706af0f0fc2c45d7b8ae13fd8caa76f9,

title = "Evidence of time-varying myocardial contribution by in vivo magnitude and phase measurement in mice",

abstract = "Cardiac volume can be estimated by a conductance catheter system. Both blood and myocardium are conductive, but only the blood conductance is desired. Therefore, the parallel myocardium contribution should be removed from the total measured conductance. Several methods have been developed to estimate the contribution from myocardium, and they only determine a single steady state value for the parallel contribution. Besides, myocardium was treated as purely resistive or mainly capacitive when estimating the myocardial contribution. We question these assumptions and propose that the myocardium is both resistive and capacitive, and its contribution changes during a single cardiac cycle. In vivo magnitude and phase experiments were performed in mice to confirm this hypothesis.",

author = "Wei, {Chia Ling} and Valvano, {Jonathan W.} and Feldman, {Marc D.} and Anil Kottam and David Altman and Karthik Raghavan and Fernandez, {Daniel J.} and Maricela Reyes and Daniel Escobedo and Pearce, {John A.}",

year = "2004",

language = "English",

volume = "26 V",

pages = "3674--3677",

journal = "Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings",

issn = "0589-1019",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

note = "Conference Proceedings - 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2004 ; Conference date: 01-09-2004 Through 05-09-2004",

}

Evidence of time-varying myocardial contribution by in vivo magnitude and phase measurement in mice. / Wei, Chia Ling; Valvano, Jonathan W.; Feldman, Marc D. et al.
In: Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings, Vol. 26 V, 2004, p. 3674-3677.

Research output: Contribution to journal › Conference article › peer-review

TY - JOUR

T1 - Evidence of time-varying myocardial contribution by in vivo magnitude and phase measurement in mice

AU - Wei, Chia Ling

AU - Valvano, Jonathan W.

AU - Feldman, Marc D.

AU - Kottam, Anil

AU - Altman, David

AU - Raghavan, Karthik

AU - Fernandez, Daniel J.

AU - Reyes, Maricela

AU - Escobedo, Daniel

AU - Pearce, John A.

PY - 2004

Y1 - 2004

N2 - Cardiac volume can be estimated by a conductance catheter system. Both blood and myocardium are conductive, but only the blood conductance is desired. Therefore, the parallel myocardium contribution should be removed from the total measured conductance. Several methods have been developed to estimate the contribution from myocardium, and they only determine a single steady state value for the parallel contribution. Besides, myocardium was treated as purely resistive or mainly capacitive when estimating the myocardial contribution. We question these assumptions and propose that the myocardium is both resistive and capacitive, and its contribution changes during a single cardiac cycle. In vivo magnitude and phase experiments were performed in mice to confirm this hypothesis.

AB - Cardiac volume can be estimated by a conductance catheter system. Both blood and myocardium are conductive, but only the blood conductance is desired. Therefore, the parallel myocardium contribution should be removed from the total measured conductance. Several methods have been developed to estimate the contribution from myocardium, and they only determine a single steady state value for the parallel contribution. Besides, myocardium was treated as purely resistive or mainly capacitive when estimating the myocardial contribution. We question these assumptions and propose that the myocardium is both resistive and capacitive, and its contribution changes during a single cardiac cycle. In vivo magnitude and phase experiments were performed in mice to confirm this hypothesis.

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M3 - Conference article

AN - SCOPUS:19944368736

SN - 0589-1019

VL - 26 V

SP - 3674

EP - 3677

JO - Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings

JF - Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings

T2 - Conference Proceedings - 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2004

Y2 - 1 September 2004 through 5 September 2004

ER -

Evidence of time-varying myocardial contribution by in vivo magnitude and phase measurement in mice

Abstract

All Science Journal Classification (ASJC) codes

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