3D Finite Element Complex Domain Numerical Models of Electric Fields in Blood and Myocardium

Chia Ling Wei, Jonathan W. Valvano, Marc D. Feldman, Matthias Nahrendorf, John A. Pearce

Research output: Contribution to journalConference articlepeer-review

7 Scopus citations

Abstract

The conductance catheter system is a tool to determine left ventricular (LV) volume in vivo. However, the accuracy of this method is limited by three assumptions of the equation to convert conductance to volume: the assumed homogeneity of electric field within LV, myocardium having resistive and not capacitive properties, and assumed constant parallel myocardial conductance. This study investigates weaknesses of these three assumptions. It proposes an equivalent circuit model for mouse LV as well as a calculation method for conductance and capacitance of LV. Furthermore, this study also demonstrates the importance of phase measurement in vivo experiments.

Original languageEnglish (US)
Pages (from-to)62-65
Number of pages4
JournalAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Volume1
StatePublished - 2003
EventA New Beginning for Human Health: Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Cancun, Mexico
Duration: Sep 17 2003Sep 21 2003

Keywords

  • Capacitive myocardium
  • Electric field inhomogeneity
  • Finite element
  • Parallel conductance
  • Phase

ASJC Scopus subject areas

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

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