Abstract:
:We measured pressure-volume curves in nine excised dog ventricles and stress-strain curves in two to five muscle specimens from each ventricle to verify a derived formula that relates muscle stiffness to the ventricular pressure-volume curve. The assumptions underlying this formula are: (1) the ventricle is a uniform spherical shell, (2) all muscle fibers carry average stress and deform as if they were at the midwall, (3) static equilibrium exists, (4) internal pressure induces the only load, and (5) the muscles exhibit an exponential stress-strain curve given by the equation sigma(epsilon) = alpha(ebeta epsilon - 1), where sigma = stress, epsilon = strain, and alpha and beta are constants. There was no significant difference between the stiffness constant, beta, inferred from the left ventricle pressure-volume curves (14+/-4.3[SD]) and that measured directly from the muscle stress-strain curves (16+/-2.8).
journal_name
Circ Resjournal_title
Circulation researchauthors
Glantz SA,Kernoff RSdoi
10.1161/01.res.37.6.787subject
Has Abstractpub_date
1975-12-01 00:00:00pages
787-94issue
6eissn
0009-7330issn
1524-4571journal_volume
37pub_type
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更新日期:2018-12-07 00:00:00
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更新日期:1989-07-01 00:00:00
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更新日期:1997-09-01 00:00:00
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更新日期:2004-04-16 00:00:00
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pub_type: 杂志文章
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更新日期:2003-11-28 00:00:00
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pub_type: 杂志文章
doi:10.1161/01.res.38.5.404
更新日期:1976-05-01 00:00:00
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journal_title:Circulation research
pub_type: 杂志文章
doi:
更新日期:1997-04-01 00:00:00
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更新日期:1981-08-01 00:00:00
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更新日期:1977-04-01 00:00:00
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更新日期:1999-03-05 00:00:00
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pub_type: 杂志文章
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更新日期:2002-03-08 00:00:00
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更新日期:1975-07-01 00:00:00
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pub_type: 杂志文章
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更新日期:1998-07-27 00:00:00
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pub_type: 杂志文章
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更新日期:1987-02-01 00:00:00