| Dynamics of flow in a mechanical heart valve: the role of leaflet inertia and leaflet compliance. | |
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MedLine Citation:
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PMID: 21428683 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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In this work, we examine the dynamics of fluid flow in a mechanical heart valve when the solid inertia and leaflet compliance are important. The fluid is incompressible and Newtonian, and the leaflet is an incompressible neo-Hookean material. In the case of an inertialess leaflet, we find that the maximum valve opening angle and the time that the valve remains closed increase as the shear modulus of the leaflet decreases. More importantly, the regurgitant volume decreases with decreasing shear modulus. When we examined the forces exerted on the leaflet, we found that the downward motion of the leaflet is initiated by a vertical force exerted on its right side and, later on, by a vertical force exerted on the top side of the leaflet. In the case of solid inertia, we find that the maximum valve opening angle and the regurgitant volume are larger than in the case of an inertialess leaflet. These results highlight the importance of solid compliance in the dynamics of blood flow in a mechanical heart valve. More importantly, they indicate that mechanical heart valves with compliant leaflets may have smaller regurgitant volumes and smaller shear stresses than the ones with rigid leaflets. |
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Authors:
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Vasileios Gkanis; Christos Housiadas |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of biomechanical engineering Volume: 133 ISSN: 1528-8951 ISO Abbreviation: J Biomech Eng Publication Date: 2011 Apr |
Date Detail:
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Created Date: 2011-03-24 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7909584 Medline TA: J Biomech Eng Country: United States |
Other Details:
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Languages: eng Pagination: 041009 Citation Subset: IM |
Affiliation:
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Thermal Hydraulics and Multiphase Flow Laboratory, INT-RP, National Center for Scientific Research "Demokritos," Agia Paraskevi, 15310 Athens, Greece. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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