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Numerical simulations of unsteady flows in a stenosed coronary bypass graft

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Numerical simulations of unsteady flows in a stenosed coronary bypass graft

Content Provider	Springer Nature Link
Author	Depla, V. Bertolotti, C. Boiron, O.
Copyright Year	2001
Abstract	Using the finite element method, physiological blood flows through a three-dimensional model of a coronary graft are numerically analysed. The model includes a stenosis shape in the host artery upstream from the anastomosis. Recirculating areas, secondary flows, wall shear stress (WSS) and spatial wall shear stress gradients (WSSGs) are studied for different flow repartitions and at different times in the cycle. The temporal and spatial evolutions of the recirculating areas downstream from the stenosis, their interactions with the flow issued from the graft and their associated WSSs highlight that the presence of the stenosis in the recipient artery is essential for prediction of the evolution of a grafting at the beginning of its implantation. The areas downstream from the stenosis expansion, non-existent for a host artery without stenosis, are submitted to low and oscillating WSS between −0.5 and 0 Nm$^{−2}$. The stagnation point on the recipient artery floor is subjected to high positive and negative WSSG$_{nd}$ values, and its location is dependent on the residual flow through the stenosis.
Starting Page	488
Ending Page	499
Page Count	12
File Format	PDF
ISSN	01400118
Journal	Medical and Biological Engineering and Computing
Volume Number	39
Issue Number	4
e-ISSN	17410444
Language	English
Publisher	Springer-Verlag
Publisher Date	2001-01-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Coronary bypass Physiological flow Three-dimensional numerical modelling Wall shear stress Stenosis Human Physiology Computer Applications Neurosciences Imaging Radiology Biomedical Engineering
Content Type	Text
Resource Type	Article
Subject	Biomedical Engineering Computer Science Applications

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