| Assessment of the influence of the compliant aortic root on aortic valve mechanics by means of a geometrical model. | |
| | |
MedLine Citation:
|
PMID: 9450254 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
In recent years several researchers have suggested that the changes in the geometry and angular dimensions of the aortic root which occur during the cardiac cycle are functional to the optimisation of aortic valve function, both in terms of diminishing leaflet stresses and of fluid-dynamic behaviour. The paper presents an analytical parametric model of the aortic valve which includes the aortic root movement. The indexes used to evaluate the valve behaviour are the circumferential membrane stress and the stress at the free edge of the leaflet, the index of bending strain, the bending of the leaflet at the line attachment in the radial and circumferential directions and the shape of the conduit formed by the leaflets during systole. In order to evaluate the role of geometric changes in valve performance, two control cases were considered, with different reference geometric configuration, where the movement of the aortic root was ignored. The results obtained appear consistent with physiological data, especially with regard to the late diastolic phase and the early ejection phase, and put in evidence the role of the aortic root movement in the improvement of valve behaviour. |
| | |
Authors:
|
A Redaelli; E Di Martino; A Gamba; A M Procopio; R Fumero |
Related Documents
:
|
1401614 - Relation between doppler color flow variables and invasively determined jet variables i... 21392264 - A case of berry syndrome type 2b. 6179184 - Replacement of the ascending aorta and aortic valve with a composite graft. results and... 14712194 - Behçet's aortitis and aortic regurgitation: a report of two cases. 9613514 - The suboccipital carrefour: cervical and vertebral arterial anastomosis. 982274 - Cephalic vein cross-over bypass for subclavian vein thrombosis: a case report. |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Medical engineering & physics Volume: 19 ISSN: 1350-4533 ISO Abbreviation: Med Eng Phys Publication Date: 1997 Dec |
Date Detail:
|
Created Date: 1998-03-12 Completed Date: 1998-03-12 Revised Date: 2004-11-17 |
Medline Journal Info:
|
Nlm Unique ID: 9422753 Medline TA: Med Eng Phys Country: ENGLAND |
Other Details:
|
Languages: eng Pagination: 696-710 Citation Subset: IM |
Affiliation:
|
Department of Bioengineering, Politecnico di Milano, Italy. redaelli@cebitec.hsr.it |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Aorta
/
physiology* Aortic Valve / physiology* Biomechanics Compliance Diastole Humans Models, Cardiovascular Myocardial Contraction Stress, Mechanical Ventricular Pressure |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: The design and performance of an experimental external fixator with variable axial stiffness and a c...
Next Document: The effect of surface topography of retrieved femoral heads on the wear of UHMWPE sockets.