Analysis of Ventricular Wall Motion Based on an Electromechanical Biventricular Model

A biventricular model, which coupled the electrical property and mechanical property of the heart, was constructed and the ventricular wall motion and deformation have been simulated based on this model. The biventricular mechanical model was constructed based on composite material theory and finite element method. The excitation propagation was simulated by electrical heart model, and the resulted active forces were used to calculate the ventricular wall motion. Regional deformation and Lagrangian strain tensors were calculated during systole phase. Displacements, minimum principal strains and torsion angle were used to describe the motion of two ventricles. The results are in good accordance with solutions obtained from MR tagging images that reported in the literatures. This simulation suggests that such electromechanical biventricular model can be used to assess the mechanical function of two ventricles.