| pubmed-article:5436883 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:5436883 | lifeskim:mentions | umls-concept:C0038435 | lld:lifeskim |
| pubmed-article:5436883 | lifeskim:mentions | umls-concept:C0012984 | lld:lifeskim |
| pubmed-article:5436883 | lifeskim:mentions | umls-concept:C0225897 | lld:lifeskim |
| pubmed-article:5436883 | lifeskim:mentions | umls-concept:C0012000 | lld:lifeskim |
| pubmed-article:5436883 | lifeskim:mentions | umls-concept:C0039155 | lld:lifeskim |
| pubmed-article:5436883 | lifeskim:mentions | umls-concept:C1704711 | lld:lifeskim |
| pubmed-article:5436883 | pubmed:issue | 4 | lld:pubmed |
| pubmed-article:5436883 | pubmed:dateCreated | 1970-5-16 | lld:pubmed |
| pubmed-article:5436883 | pubmed:abstractText | A model is proposed for stress analysis of the left ventricular wall (LV wall) based on the realistic assumption that the myocardium is essentially composed of fiber elements which carry only axial tension and vary in orientation through the wall. Stress analysis based on such a model requires an extensive study of muscle fiber orientation and curvature through the myocardium. Accordingly, the principal curvatures were studied at a local site near the equator in ten dog hearts rapidly fixed in situ at end diastole and end systole; the fiber orientation for these hearts had already been established in a previous study. The principal radii of curvature were (a) measured by fitting templates to the endocardial and epicardial wall surfaces in the circumferential and longitudinal directions and (b) computed from measured lengths of semiaxes of ellipsoids of revolution representing the LV wall ("ellipsoid" data). The wall was regarded as a tethered set of nested shells, each having a unique fiber orientation. Results indicate the following. (a) Fiber curvature, k, is maximum at midwall at end systole; this peak shifts towards endocardium at end diastole. (b) The pressure or radial stress through the wall decreases more rapidly near the endocardium than near the epicardium at end diastole and at end systole when a constant tension is assumed for each fiber through the wall. (c) At end diastole the curve for the circumferential stress vs. wall thickness is convex with a maximum at midwall. In the longitudinal direction the stress distribution curve is concave with a minimum at midwall. Similar distributions are obtained at end systole when a constant tension is assumed for each fiber through the wall. (d) The curvature and stress distributions obtained by direct measurements at a selected local site agree well with those computed from "ellipsoid" data. | lld:pubmed |
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| pubmed-article:5436883 | pubmed:language | eng | lld:pubmed |
| pubmed-article:5436883 | pubmed:journal | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:5436883 | pubmed:citationSubset | IM | lld:pubmed |
| pubmed-article:5436883 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:5436883 | pubmed:month | Apr | lld:pubmed |
| pubmed-article:5436883 | pubmed:issn | 0006-3495 | lld:pubmed |
| pubmed-article:5436883 | pubmed:author | pubmed-author:RossJJJr | lld:pubmed |
| pubmed-article:5436883 | pubmed:author | pubmed-author:PatelD JDJ | lld:pubmed |
| pubmed-article:5436883 | pubmed:author | pubmed-author:SonnenblickE... | lld:pubmed |
| pubmed-article:5436883 | pubmed:author | pubmed-author:SpotnitzH MHM | lld:pubmed |
| pubmed-article:5436883 | pubmed:author | pubmed-author:StreeterD... | lld:pubmed |
| pubmed-article:5436883 | pubmed:author | pubmed-author:VaishnavR NRN | lld:pubmed |
| pubmed-article:5436883 | pubmed:issnType | Print | lld:pubmed |
| pubmed-article:5436883 | pubmed:volume | 10 | lld:pubmed |
| pubmed-article:5436883 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:5436883 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:5436883 | pubmed:pagination | 345-63 | lld:pubmed |
| pubmed-article:5436883 | pubmed:dateRevised | 2009-11-18 | lld:pubmed |
| pubmed-article:5436883 | pubmed:meshHeading | pubmed-meshheading:5436883-... | lld:pubmed |
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| pubmed-article:5436883 | pubmed:meshHeading | pubmed-meshheading:5436883-... | lld:pubmed |
| pubmed-article:5436883 | pubmed:year | 1970 | lld:pubmed |
| pubmed-article:5436883 | pubmed:articleTitle | Stress distribution in the canine left ventricle during diastole and systole. | lld:pubmed |
| pubmed-article:5436883 | pubmed:publicationType | Journal Article | lld:pubmed |
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