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.
| Original language | English (US) |
|---|---|
| Title of host publication | 2010 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC'10 |
| Pages | 3556-3558 |
| Number of pages | 3 |
| DOIs | |
| State | Published - 2010 |
| Event | 2010 32nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC'10 - Buenos Aires, Argentina Duration: Aug 31 2010 → Sep 4 2010 |
Other
| Other | 2010 32nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC'10 |
|---|---|
| Country | Argentina |
| City | Buenos Aires |
| Period | 8/31/10 → 9/4/10 |
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ASJC Scopus subject areas
- Biomedical Engineering
Cite this
Accuracy considerations in catheter based estimation of Left ventricular volume. / Pearce, John A.; Porterfield, John E.; Larson, Erik R.; Valvano, Jonathan W.; Feldman, Marc D.
2010 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC'10. 2010. p. 3556-3558 5627712.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Accuracy considerations in catheter based estimation of Left ventricular volume
AU - Pearce, John A.
AU - Porterfield, John E.
AU - Larson, Erik R.
AU - Valvano, Jonathan W.
AU - Feldman, Marc D
PY - 2010
Y1 - 2010
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=78650815054&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78650815054&partnerID=8YFLogxK
U2 - 10.1109/IEMBS.2010.5627712
DO - 10.1109/IEMBS.2010.5627712
M3 - Conference contribution
C2 - 21097041
AN - SCOPUS:78650815054
SN - 9781424441235
SP - 3556
EP - 3558
BT - 2010 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC'10
ER -