Document Detail


Estimation of local myocardial stress.
MedLine Citation:
PMID:  7081458     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Two formulas are presented for estimating local average circumferential stress in the left ventricle from the cavity pressure and various quantities, available from the angiogram, which characterize the size and shape of the cavity and ventricular wall. The advantages of these formulas are as follows: 1) they are based on thick-wall shell theory; 2) they are intended for application at positions in the ventricular wall other than the base; and 3) they are based on a more general representation of ventricular geometry than a sphere, cylinder, or ellipsoid. Except for one location, both formulas predict average circumferential stresses that agree to within 25% with the corresponding stresses in a finite element model of an aneurysmal ventricle. In addition, at the equator of a thick-wall ellipsoid, the formulas are identical in form to a previously derived formula that has been shown to predict stresses that are in fair to good agreement with measured stresses in the open-chest dog heart.
Authors:
R F Janz
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The American journal of physiology     Volume:  242     ISSN:  0002-9513     ISO Abbreviation:  Am. J. Physiol.     Publication Date:  1982 May 
Date Detail:
Created Date:  1982-07-08     Completed Date:  1982-07-08     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0370511     Medline TA:  Am J Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  H875-81     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Heart / physiology*
Models, Cardiovascular*
Stress, Mechanical*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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