Finite element models used for the analysis of cardiac defibrillation

A finite-element model has been developed of the canine heart and thorax to examine different aspects of the distribution of current through cardiac tissue during defibrillation. This two-dimensional, isotropic model has enabled the authors to analyze some of the determinants of defibrillation, and it has provided tools for the analysis and comparison of different electrode configurations for the implantable cardioverter/defibrillator. A more detailed interpretation of experimental data may require the extension of the model to a three-dimensional one with bisyncytial, anisotropic cardiac tissue.<>