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Three-Dimensional Finite Element Analysis of Stress and Activation in the Heart

by A. D. McCulloch, AMES-Bioengineering, UCSD, La Jolla, United States,
J. M. Guccione, AMES-Bioengineering, UCSD, La Jolla, United States,
J. M. Rogers, AMES-Bioengineering, UCSD, La Jolla, United States,
P. J. Hunter, AMES-Bioengineering, UCSD, La Jolla, United States,



Document Type: Proceeding Paper

Part of: Mechanics Computing in 1990's and Beyond

Abstract:

A finite element (FE) method has been developed for three-dimensional (3D) analysis of stress distributions and activation patterns in the left and right ventricles of the canine heart. The stress analysis predicted transmural distributions of end-systolic principal strains that agree closely with measurements from the beating heart. The principal stress distribution was dominated by a tensile fiber stress with compressive radial and cross-fiber components. The anisotropic propagation of cardiac activation is being modelled by the nonlinear FitzHugh-Nagumo system of equations implemented using a new combined collocation/Galerkin approach.

Subject Headings: Finite element method | Stress analysis | Three-dimensional analysis | Stress distribution | Mathematical models | Human and behavioral factors | Tensile strength

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