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Abstract #2253

Identification of hyperelastic properties of the myocardium from CMR patient-specific 3D geometry and the Virtual Field Method.

Delphine Perie1, Mehdi Ghafari1, and Daniel Curnier2
1Mechanical Engineering, Polytechnique Montreal, Montreal, QC, Canada, 2Kinesiology, University of Montreal, Montreal, QC, Canada

Due to the complexity of the heart’s geometry, the characterization of the material properties of the myocardium remains challenging. Using kinematically admissible hyperboloid virtual fields and a finite element mesh of the left ventricle, we successfully solved the virtual field method equations to determine the stiffness of the myocardium from a reverse identification approach. The distribution of the elastic stiffness presented same patterns between the 3 volunteers. However, the standard risk volunteer presented higher stiffness within the mobile wall than the high risk volunteers. This approach would be an efficient tool to characterize early cardiac dysfunction.

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