Abstract
Mechanical properties of the myocardium have been investigated intensively in the last four decades. Due to the nonlinearity and history dependence of the myocardial deformation, many complex strain energy functions have been used to describe the stress-strain relationship of myocardium. These functions are good at fitting in-vitro experimental data from myocardial stretch testing. However it is difficult to model in-vivo myocardium by using the strain energy functions. In a previous paper [24], we have implemented transversely anisotropic material model to estimate in-vivo strain-stress analysis in the myocardium. In this work, the fiber orientation is updated at each time step from the end of diastole to the end of systole, and the stiffness matrix is recalculated using the current fiber orientation. We also extended our model to include residual ventricular stresses and time dependent blood pressure in the left ventricle cavity.
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Hu, Z., Metaxas, D., Axel, L. (2003). Left Ventricle Composite Material Model for Stress-Strain Analysis. In: Ayache, N., Delingette, H. (eds) Surgery Simulation and Soft Tissue Modeling. IS4TM 2003. Lecture Notes in Computer Science, vol 2673. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-45015-7_21
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DOI: https://doi.org/10.1007/3-540-45015-7_21
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