Analysis of flow dynamics in right ventricular outflow tract.

Détails

ID Serval
serval:BIB_396AB3A67D1F
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Analysis of flow dynamics in right ventricular outflow tract.
Périodique
Journal of Surgical Research
Auteur(s)
Berdajs D.A., Mosbahi S., Charbonnier D., Hullin R., von Segesser L.K.
ISSN
1095-8673 (Electronic)
ISSN-L
0022-4804
Statut éditorial
Publié
Date de publication
2015
Peer-reviewed
Oui
Volume
197
Numéro
1
Pages
50-57
Langue
anglais
Notes
Publication types: Journal Article Publication Status: ppublish
Résumé
BACKGROUND: The mechanism behind early graft failure after right ventricular outflow tract (RVOT) reconstruction is not fully understood. Our aim was to establish a three-dimensional computational fluid dynamics (CFD) model of RVOT to investigate the hemodynamic conditions that may trigger the development of intimal hyperplasia and arteriosclerosis.
METHODS: Pressure, flow, and diameter at the RVOT, pulmonary artery (PA), bifurcation of the PA, and left and right PAs were measured in 10 normal pigs with a mean weight of 24.8 ± 0.78 kg. Data obtained from the experimental scenario were used for CFD simulation of pressure, flow, and shear stress profile from the RVOT to the left and right PAs.
RESULTS: Using experimental data, a CFD model was obtained for 2.0 and 2.5-L/min pulsatile inflow profiles. In both velocity profiles, time and space averaged in the low-shear stress profile range from 0-6.0 Pa at the pulmonary trunk, its bifurcation, and at the openings of both PAs. These low-shear stress areas were accompanied to high-pressure regions 14.0-20.0 mm Hg (1866.2-2666 Pa). Flow analysis revealed a turbulent flow at the PA bifurcation and ostia of both PAs.
CONCLUSIONS: Identified local low-shear stress, high pressure, and turbulent flow correspond to a well-defined trigger pattern for the development of intimal hyperplasia and arteriosclerosis. As such, this real-time three-dimensional CFD model may in the future serve as a tool for the planning of RVOT reconstruction, its analysis, and prediction of outcome.
Pubmed
Web of science
Création de la notice
29/06/2015 13:23
Dernière modification de la notice
20/08/2019 14:29
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