Key result
An electromechanical biventricular model successfully simulated right ventricular wall motion and deformation during systole, showing good accordance with solutions obtained from MR tagging images.
A novel electromechanical biventricular model accurately simulates right ventricular wall motion and deformation, matching MR tagging data.
Based on our previously developed electrical heart model, an electromechanical biventricular model, which couples the electrical property and mechanical property of the heart, was constructed and the right ventricular wall motion and deformation was simulated using this model. The model was developed on the basis of composite material theory and finite element method. The excitation propagation was simulated by electrical heart model, and the resultant active forces were used to study the ventricular wall motion during systole. The simulation results show that: (1) The right ventricular free wall moves towards the septum, and at the same time, the base and middle of free wall move towards the apex, which reduce the volume of right ventricle; (2) The minimum principle strain (E3) is largest at the apex, then at the middle of free wall, and its direction is in the approximate direction of epicardial muscle fibers. These results are in good accordance with solutions obtained from MR tagging images. It suggests that such electromechanical biventricular model can be used to assess the mechanical function of two ventricles.
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Xia et al. (2005) studied Right ventricular wall motion. Electromechanical biventricular model vs. MR tagging images was evaluated on Right ventricular wall motion and deformation. An electromechanical biventricular model successfully simulated right ventricular wall motion and deformation during systole, showing good accordance with solutions obtained from MR tagging images.
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