NDLI: Accuracy considerations in catheter based estimation of left ventricular volume

Content Provider	IEEE Xplore Digital Library
Author	Pearce, J.A. Porterfield, J.E. Larson, E.R. Valvano, J.W. Feldman, M.D.
Copyright Year	2010
Description	Author affiliation: Temple Foundation Professor of Electrical and Computer Engineering at the University of Texas at Austin, 1 University Station, 78712, USA (Pearce, J.A.) \|\| Electrical Engineering at the University of Texas at Austin, USA (Porterfield, J.E.; Larson, E.R.) \|\| Electrical and Computer Engineering at the University of Texas at Austin, USA (Valvano, J.W.) \|\| Cardiac Catheterization Laboratory at the University of Texas Health Science Center - San Antonio, USA (Feldman, M.D.)
Abstract	Cardiac volume estimation in the Left Ventricle from impedance or admittance measurement is subject to two major sources of error: parallel current pathways in surrounding tissues and a non uniform current density field. The accuracy of volume estimation can be enhanced by incorporating the complex electrical properties of myocardium to identify the muscle component in the measurement and by including the transient nature of the field non uniformity. Cardiac muscle is unique in that the permittivity is high enough at audio frequencies to make the muscle component of the signal identifiable in the imaginary part of an admittance measurement. The muscle contribution can thus be uniquely identified and removed from the combined muscle - blood measurement. In general, both error sources are transient and are best removed in real time as data are collected. This paper reviews error correction methods and establishes that the relative magnitudes of the error concerns are different in small and large hearts.
Starting Page	3556
Ending Page	3558
File Size	374592
Page Count	3
File Format	PDF
ISBN	9781424441235
ISSN	1557170X
DOI	10.1109/IEMBS.2010.5627712
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-08-31
Publisher Place	Argentina
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Catheters Muscles Volume measurement Transient analysis Blood Electrodes Mice
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

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