Numerical Simulation of the Electromechanical Activity of the Heart

Authors:
Dominique Chapelle;Miguel A. Fernández;Jean-Frédéric Gerbeau;Philippe Moireau;Jacques Sainte-Marie;Nejib Zemzemi
Affiliations:
INRIA, Rocquencourt, Le Chesnay cedex, France 78153;INRIA, Rocquencourt, Le Chesnay cedex, France 78153;INRIA, Rocquencourt, Le Chesnay cedex, France 78153;INRIA, Rocquencourt, Le Chesnay cedex, France 78153;INRIA, Rocquencourt, Le Chesnay cedex, France 78153 and LNHE/CETMEF, Chatou cedex, France 78401;INRIA, Rocquencourt, Le Chesnay cedex, France 78153 and Laboratoire de mathématiques d'Orsay, Univ. Paris 11, Orsay cedex, France 91405
Venue:
FIMH '09 Proceedings of the 5th International Conference on Functional Imaging and Modeling of the Heart
Year:
2009

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Abstract

We present numerical results obtained with a three-dimensional electromechanical model of the heart with a complete realistic anatomy. The electrical activity of the heart-torso domain is described by the bidomain equations in the heart and a Laplace equation in the torso. The mechanical model is based on a chemically-controlled contraction law of the myofibres integrated in a 3D continuum mechanics description accounting for large displacements and strains, and the main cardiovascular blood compartments are represented by simplified lumped models. We considered a normal case and a pathological condition and the medical indicators resulting from the simulations show physiological values, both for mechanical and electrical quantities of interest, in particular pressures, volumes and ECGs.