Use of the conductance catheter to determine left ventricular volume: current leakage beyond the left ventricular cavity

Patrick W. Finnerty, Marc D. Feldman, Clarence Wu, Komathi Subbiah, Howard L. Haber, Antharvedi Anne, Thomas C. Skalak

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

The conductance catheter offers the only method for the determination of left ventricular volume on a continuous basis in patients. Two potential limitations of this technique include inhomogeneity of the electric field and current leakage into adjacent structures. The objectives of this study were to determine the extent of current leakage into adjacent structures and the sources of additional volume detected when the electric field is made more homogeneous. Both nonconductive and conductive cylinders over the range of left ventricular volumes seen clinically were constructed. The conductance catheter was radially centered in the models and a signal conditioner-processor was used to generate the electric field and calculate the corresponding volume. The conductive models were surrounded by saline to simulate surrounding structures. We demonstrate that electric current does not extend beyond the model wall, implying that adjacent structures such as the right ventricle are unlikely to affect the conductive volume measurements in vivo. Second,the increased homogeneity of the electric field detects more chamber but not more wall volume.

Original languageEnglish (US)
Title of host publicationProceedings of the Annual Conference on Engineering in Medicine and Biology
EditorsAndrew Y.J. Szeto, Rangaraj M. Rangayyan
PublisherPubl by IEEE
Pages903-904
Number of pages2
Editionpt 2
ISBN (Print)0780313771
StatePublished - Dec 1 1993
Externally publishedYes
EventProceedings of the 15th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 2 (of 3) - San Diego, CA, USA
Duration: Oct 28 1993Oct 31 1993

Publication series

NameProceedings of the Annual Conference on Engineering in Medicine and Biology
Numberpt 2
Volume15
ISSN (Print)0589-1019

Other

OtherProceedings of the 15th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 2 (of 3)
CitySan Diego, CA, USA
Period10/28/9310/31/93

ASJC Scopus subject areas

  • Signal Processing
  • Biomedical Engineering
  • Computer Vision and Pattern Recognition
  • Health Informatics

Fingerprint

Dive into the research topics of 'Use of the conductance catheter to determine left ventricular volume: current leakage beyond the left ventricular cavity'. Together they form a unique fingerprint.

Cite this