| Silicone rubber trileaflet valve assessment using cardiovascular magnetic resonance imaging. | |
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MedLine Citation:
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PMID: 21095819 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Hydrodynamic valve performance is usually evaluated by effective orifice area (EOA), geometric orifice area (GOA) and transvalvular pressure gradients (PG). Magnetic resonance imaging (MRI) is a very efficient tool for assessing these parameters. In this study, we evaluated a silicone rubber trileaflet valve using MRI. EOA, GOA and PG were evaluated under steady (12 l/min - 20 l/min) and pulsatile (5 l/min) flow conditions using continuity equation, planimetry and simplified Bernoulli's equation respectively; the contraction coefficient (Cc) and Reynolds number (Re) were also evaluated as hydrodynamic parameters. The highest EOAs were 0.75 cm(2) for steady flow conditions and 0.98 cm(2) for pulsatile flow. For pulsatile flow conditions greater GOA by planimetry was 1.43 cm(2). For both flow conditions the highest PGs were > 40 mmHg. Cc was on range from 0.8 to 0.86 under steady flow conditions and 0.68 for pulsatile flow at peak sytole. The Re was much greater than 2200 for all flow conditions. This study allowed the non invasive evaluation of a silicone rubber trileaflet valve under steady and pulsatile conditions with MRI in order to understand valve opening. |
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Authors:
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Julio Garcia; Lyes Kadem; Philippe Pibarot |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference Volume: 1 ISSN: 1557-170X ISO Abbreviation: Conf Proc IEEE Eng Med Biol Soc Publication Date: 2010 |
Date Detail:
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Created Date: 2010-11-24 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101243413 Medline TA: Conf Proc IEEE Eng Med Biol Soc Country: United States |
Other Details:
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Languages: eng Pagination: 5169-72 Citation Subset: IM |
Affiliation:
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Laboratory of Cardiovascular Fluid Dynamics, Concordia University, Montreal, Canada. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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