Electrical conductivity values used with the bidomain model of cardiac tissue

Electrical conductivities in the bidomain model of cardiac tissue are expressed as functions of four parameters. These expressions allow simulations to be performed using nominal, equal, and reciprocal anisotropy without introducing undesired effects, such as length constant variations. Relative values of the bidomain conductivities are estimated to be: [[Sigma].sub.iL] = 1, [[Sigma].sub.iT] = 0.1, [[Sigma].sub.eL] = 1, and [[Sigma].sub.eT] = 0.4. Index Terms - Anisotropy, bidomain, cardiac tissue, conductivity.