A resistor interpretation of general anisotropic cardiac tissue.

Journal Article

This paper describes a spatial discretization scheme for partial differential equation systems that contain anisotropic diffusion. The discretization method uses unstructured finite volumes, or the boxes, that are formed as a secondary geometric structure from an underlying triangular mesh. We show how the discretization can be interpreted as a resistive circuit network, where each resistor is assigned at each edge of the triangular element. The resistor is computed as an anisotropy dependent geometric quantity of the local mesh structure. Finally, we show that under certain conditions, the discretization gives rise to negative resistors that can produce non-physical hyperpolarizations near depolarizing stimuli. We discuss how the proper choice of triangulation (anisotropic Delaunay triangulation) can ensure monotonicity (i.e. all resistors are positive).

Full Text

Duke Authors

Cited Authors

  • Shao, H; Sampson, KJ; Pormann, JB; Rose, DJ; Henriquez, CS

Published Date

  • February 2004

Published In

Volume / Issue

  • 187 / 2

Start / End Page

  • 155 - 174

PubMed ID

  • 14739082

International Standard Serial Number (ISSN)

  • 0025-5564

Language

  • eng

Conference Location

  • United States