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Numerical study of wall shear stress-based descriptors in the human left coronary artery

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  • S. I. S. Pinto
  • J. B. L. M. Campos

Abstract

The present work is about the application of wall shear stress descriptors – time averaged wall shear stress (TAWSS), oscillating shear index (OSI) and relative residence time (RRT) – to the study of blood flow in the left coronary artery (LCA). These descriptors aid the prediction of disturbed flow conditions in the vessels and play a significant role in the detection of potential zones of atherosclerosis development. Hemodynamic descriptors data were obtained, numerically, through ANSYS® software, for the LCA of a patient-specific geometry and for a 3D idealized model. Comparing both cases, the results are coherent, in terms of location and magnitude. Low TAWSS, high OSI and high RRT values are observed in the bifurcation – potential zone of atherosclerosis appearance. The dissimilarities observed in the TAWSS values, considering blood as a Newtonian or non-Newtonian fluid, releases the importance of the correct blood rheologic caracterization. Moreover, for a higher Reynolds number, the TAWSS values decrease in the bifurcation and along the LAD branch, increasing the probability of plaques deposition. Furthermore, for a stenotic LCA model, very low TAWSS and high RRT values in front and behind the stenosis are observed, indicating the probable extension, in the flow direction, of the lesion.

Suggested Citation

  • S. I. S. Pinto & J. B. L. M. Campos, 2016. "Numerical study of wall shear stress-based descriptors in the human left coronary artery," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 19(13), pages 1443-1455, October.
    • Handle: RePEc:taf:gcmbxx:v:19:y:2016:i:13:p:1443-1455
    DOI: 10.1080/10255842.2016.1149575
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    1. G. De Santis & M. Conti & B. Trachet & T. De Schryver & M. De Beule & J. Degroote & J. Vierendeels & F. Auricchio & P. Segers & P. Verdonck & B. Verhegghe, 2013. "Haemodynamic impact of stent–vessel (mal)apposition following carotid artery stenting: mind the gaps!," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 16(6), pages 648-659, June.
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    Cited by:

    1. Manuel Lagache & Ricardo Coppel & Gérard Finet & François Derimay & Roderic I. Pettigrew & Jacques Ohayon & Mauro Malvè, 2021. "Impact of Malapposed and Overlapping Stents on Hemodynamics: A 2D Parametric Computational Fluid Dynamics Study," Mathematics, MDPI, vol. 9(8), pages 1-19, April.

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