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AJNR Am J Neuroradiol. 2014 Oct;35(10):1849-57. doi: 10.3174/ajnr.A3710. Epub 2013 Sep 12.

CFD: computational fluid dynamics or confounding factor dissemination? The role of hemodynamics in intracranial aneurysm rupture risk assessment.

Author information

1
From the Toshiba Stroke and Vascular Research Center (J.X., V.M.T., K.V.S., H.M.) Departments of Neurosurgery (J.X.).
2
From the Toshiba Stroke and Vascular Research Center (J.X., V.M.T., K.V.S., H.M.) Biomedical Engineering (V.M.T.).
3
From the Toshiba Stroke and Vascular Research Center (J.X., V.M.T., K.V.S., H.M.).
4
From the Toshiba Stroke and Vascular Research Center (J.X., V.M.T., K.V.S., H.M.) Mechanical and Aerospace Engineering (H.M.), University at Buffalo, State University of New York, Buffalo, New York. huimeng@buffalo.edu.

Abstract

Image-based computational fluid dynamics holds a prominent position in the evaluation of intracranial aneurysms, especially as a promising tool to stratify rupture risk. Current computational fluid dynamics findings correlating both high and low wall shear stress with intracranial aneurysm growth and rupture puzzle researchers and clinicians alike. These conflicting findings may stem from inconsistent parameter definitions, small datasets, and intrinsic complexities in intracranial aneurysm growth and rupture. In Part 1 of this 2-part review, we proposed a unifying hypothesis: both high and low wall shear stress drive intracranial aneurysm growth and rupture through mural cell-mediated and inflammatory cell-mediated destructive remodeling pathways, respectively. In the present report, Part 2, we delineate different wall shear stress parameter definitions and survey recent computational fluid dynamics studies, in light of this mechanistic heterogeneity. In the future, we expect that larger datasets, better analyses, and increased understanding of hemodynamic-biologic mechanisms will lead to more accurate predictive models for intracranial aneurysm risk assessment from computational fluid dynamics.

PMID:
24029393
DOI:
10.3174/ajnr.A3710
[Indexed for MEDLINE]
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