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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemical engineering
A 2D finite element model of the interventricular septum under normal and abnormal loading
Computer Methods in Biomechanics and Biomedical Engineering, Volume 4, No. 4, Year 2001
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Description
The interventricular septum is the structure that separates the left and right ventricles of the heart. Under normal loading conditions, it is concave to the left ventricle, but under abnormal loading the septum flattens and occasionally inverts. In the past, the septum has frequently been modelled as integral to the left ventricle with the effects of pressure from the right ventricle being ignored. Under abnormal loading, the septum has been described as behaving equivalent to a "flapping sail". There has been no consideration of structural behaviour under these conditions. A 2-D plane stress FE model of the septum was used to investigate the difference in structural behaviour of the septum during diastole between normal and abnormal loading. The biaxial stress patterns that develop are distinctively disparate. Under normal loading, the septum behaves much like a thick-walled cylinder subject to internal and external pressure, with the resulting stresses being circumferential tension and radial compression, both varying with radius. These stresses are very low throughout most of diastole. However, under abnormal loading, the septum behaves in an arch-like fashion, with high compressive stresses almost circumferential in direction, combined with radial compression. We conclude that right ventricular pressures cause bending effects in the wall of the heart, and that under abnormal loading, the compressive stresses that develop in the septum may lead to an understanding of certain, previously unexplained, pathological conditions. © 2001 OPA (Overseas Publishers Association) N.V.
Authors & Co-Authors
Nelson, Gregg S.
United States, Baltimore
The Johns Hopkins Hospital
Sayed-Ahmed, Ezzeldin Yazeed
Egypt, Cairo
Faculty of Engineering Ain Shams University
ter Keurs, Hendrick E.D.J.
Canada, Calgary
Health Sciences Centre Calgary
Tyberg, J. V.
Canada, Calgary
University of Calgary
Shrive, Nigel Graham
Canada, Calgary
University of Calgary
Statistics
Citations: 8
Authors: 5
Affiliations: 4
Identifiers
Doi:
10.1080/10255840108908011
ISSN:
10255842
e-ISSN:
14768259