Prediction ofDeformation inthe Ventricle Using the Potassium - Arrested Canine Finite Element Model Left

A finite element model for the diastolic anine left vcntricle based on large deformation theory has been developed. The myecardial stress-strain relation determined by the diastoric pressure-yolume relation was used in this study, The ventricle was assumed as a homogeneous, isotropic, thick-walled solid of revolution with variable thickness. The predicted shapes based on the model were in close agreement with the shapes recorded by two-dimensional echocardiegraphy. The stress calculated at thc subendocardium was considerably larger as compared to that at the subepicardium. For example, at an intraventricular pressure of 10 cmH20, the stress at the subcndocadium was 8e gfcm2 and about four times larger than that at the subepicardium.