Estimation of cardiac bidomain parameters from extracellular measurement: two dimensional study.

Published

Journal Article

Cardiac tissue conductivity measurements can be used to assess the electrical substrate underlying normal and abnormal wavefront propagation. We describe a method of solving the inverse cardiac bidomain model to estimate average longitudinal and transverse intra and extra-cellular conductivities and fiber angle relative to an electrode array placed arbitrarily on the epi- or endocardial surface. A Newton-Raphson reconstruction method and two Tikhonov-type regularizations were able to stably identify conductivities and fiber angles in tissue models having anisotropies similar to those in real cardiac tissue. The reconstruction methods were tested with data from increasingly realistic two dimensional cardiac bidomain models and performed well both when measurement noise was added, and when simulated experimental and forward model matching was diminished. This approach may be a suitable basis for continuous monitoring of myocardial condition in-vivo via a catheter based electrode array.

Full Text

Duke Authors

Cited Authors

  • Sadleir, R; Henriquez, C

Published Date

  • August 2006

Published In

Volume / Issue

  • 34 / 8

Start / End Page

  • 1289 - 1303

PubMed ID

  • 16804743

Pubmed Central ID

  • 16804743

Electronic International Standard Serial Number (EISSN)

  • 1573-9686

International Standard Serial Number (ISSN)

  • 0090-6964

Digital Object Identifier (DOI)

  • 10.1007/s10439-006-9128-2

Language

  • eng