Istituto di Matematica Applicata e Tecnologie Informatiche     
Pennacchio M. The mortar finite element method for the cardiac ''bidomain''model of extracellular potential. Preprint ercim.cnr.ian//2002-1280, 2002.
This paper deals with the efficient and accurate computation of extracellular potentials in a simplified model of myocardial tissue. The electrical activity of the heart is characterized by a narrow wavefront spreading through the myocardium. To increase the accuracy of the computation, a non-conforming non-overlapping domain decomposition based on the mortar method is used, allowing adaptivity in the regions closed to the wavefront. The benefits of the adaptive grid refinement process are illustrated by numerical results that show how the method works and its efficiency if compared to the classical conforming Finite Element Method.
Subject Domain decomposition, mortar FEM, cardiac bidomain potential problem

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