Computational Fluid Dynamics Analysis of the Effect of Plaques in the Left Coronary Artery

Chaichana, Thanapong and Sun, Zhonghua and Jewkes, James (2012) Computational Fluid Dynamics Analysis of the Effect of Plaques in the Left Coronary Artery. Computational and Mathematical Methods in Medicine, 2012. pp. 1-9. ISSN 1748-670X

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Official URL: http://doi.org/10.1155/2012/504367

Abstract

This study was to investigate the hemodynamic effect of simulated plaques in left coronary artery models, which were generated from a sample patient’s data. Plaques were simulated and placed at the left main stem and the left anterior descending (LAD) to produce at least 60% coronary stenosis. Computational fluid dynamics analysis was performed to simulate realistic physiological conditions that reflect the in vivo cardiac hemodynamics, and comparison of wall shear stress (WSS) between Newtonian and non-Newtonian fluid models was performed. The pressure gradient (PSG) and flow velocities in the left coronary artery were measured and compared in the left coronary models with and without presence of plaques during cardiac cycle. Our results showed that the highest PSG was observed in stenotic regions caused by the plaques. Low flow velocity areas were found at postplaque locations in the left circumflex, LAD, and bifurcation. WSS at the stenotic locations was similar between the non-Newtonian and Newtonian models although some more details were observed with non-Newtonian model. There is a direct correlation between coronary plaques and subsequent hemodynamic changes, based on the simulation of plaques in the realistic coronary models.

Item Type: Article
Keywords: Computational fluid dynamics Coronary plaques Left coronary artery Pressure gradient Stenosis Wall shear stress
Faculty / Department: Faculty of Science > Mathematics and Computer Science
Depositing User: Thanapong Chaichana
Date Deposited: 07 Jul 2016 11:49
Last Modified: 07 Jul 2016 11:49
URI: http://hira.hope.ac.uk/id/eprint/1507

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