Passive elastic wall stiffness of the left ventricle: A comparison between linear theory and large deformation theory
✍ Scribed by I. Mirsky; R.F. Janz; B.R. Kubert; B. Korecky; G.C. Taichman
- Publisher
- Springer
- Year
- 1976
- Tongue
- English
- Weight
- 507 KB
- Volume
- 38
- Category
- Article
- ISSN
- 1522-9602
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✦ Synopsis
Assuming a sph@2ical geometry for the left ventricle, passive elastic stiffness-stress relations have been obtained on the basis of linear elasticity theory and large deformation theory. Employing pressure-volume data taken from rat hearts of various age groups, it is shown that young rat heart muscle (1 month) is stiffer than either adult (7 months) or old rat heart muscle (17 months). Although the qualitative results are similar for both elasticity theories, the large deformation theory gave results in closer agreement with those obtained from papillary muscle studies. These results imply that stiffness of muscle per se can be assessed from left ventricular pressure-volume data.