| Hydrodynamics of color M-mode Doppler flow wave propagation velocity V(p): a computer study. | |
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MedLine Citation:
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PMID: 11875384 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study was designed to show the hydrodynamic mechanism of left ventricular (LV) flow wave propagation and to relate this propagated velocity to 2-dimensional (2D) color and color M-mode Doppler echocardiograms. A computer model is developed describing 3-dimensional axisymmetrical LV filling flow. The unsteady Navier-Stokes flow equations are solved in an LV truncated ellipsoid geometry with moving LV walls, including relaxation and compliance of the wall. The computed results confirm both intraventricular flow and pressure patterns during filling. Vortices are formed during the acceleration phases of the early and atrial filling waves. During the deceleration phases, the vortices are amplified and convected into the ventricle. The vortices are recognized on the derived 2D color echocardiograms as in vivo. The propagation of this vortex determines the propagation of the maximum velocity observed in the color M-mode Doppler echocardiogram. For pseudonormal filling of the left ventricle, the LV flow wave propagation velocity decreases. |
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Authors:
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Jan A Vierendeels; Erik Dick; Pascal R Verdonck |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography Volume: 15 ISSN: 0894-7317 ISO Abbreviation: J Am Soc Echocardiogr Publication Date: 2002 Mar |
Date Detail:
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Created Date: 2002-03-04 Completed Date: 2002-04-23 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8801388 Medline TA: J Am Soc Echocardiogr Country: United States |
Other Details:
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Languages: eng Pagination: 219-24 Citation Subset: IM |
Affiliation:
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Institute Biomedical Technology, Ghent University, Ghent, Belgium. Jan.Vierendeels@rug.ac.be |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Blood Flow Velocity Computer Simulation Echocardiography, Doppler, Color / methods* Hemodynamics / physiology Models, Cardiovascular Myocardial Contraction / physiology* Ventricular Function, Left / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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