Key result
Increasing carotid stenosis severity progressively worsens outlet pressure drops and adverse wall shear stress patterns.
Why the study?
Carotid artery narrowing from plaque deposition is a leading cause of stroke and heart disease, and mechanical forces like wall shear stress and pressure play important roles in plaque growth and artery wall rupture.
Does increasing carotid artery stenosis severity (from 25% to 50% and 75%) enhance pulsatile outlet pressure drops and extremes of wall shear stress in an idealized computational fluid dynamics model?
Does increasing carotid artery stenosis severity (from 25% to 50% and 75%) enhance pulsatile outlet pressure drops and extremes of wall shear stress in an idealized computational fluid dynamics model?
This computational fluid dynamics study demonstrates that tighter carotid stenosis geometries directly amplify trans-stenotic systolic pressure drops, peak throat wall shear stress, and downstream low-shear recirculation zones, providing a biomechanical basis for elevated plaque rupture and thrombosis risk in severe carotid disease.
Answers are grounded in this paper and cite their sources.
These simulated hemodynamic shifts may signal elevated cerebrovascular risk; leaves open clinical validation before informing stenosis management.
Narrowing of the carotid arteries by plaque deposition is a leading cause of stroke and heart disease in humans. The mechanical forces exerted by blood on the artery wall, particularly wall shear stress (WSS) and pressure, play important roles in both plaque growth and artery wall rupture. This project uses computational fluid dynamics (CFD) to simulate pulsatile blood flow in simplified carotid-like tubes with three levels of stenosis (75%, 50%, and 25% reduction in cross-sectional area) to investigate how narrowing severity affects outlet pressure fluctuations and WSS distributions. Preliminary results from two cases (75% and 50% stenosis) show that increasing stenosis depth enhances both the pulsatile pressure drop and the extremes of wall shear stress at the throat, consistent with clinical observations linking severe stenoses to cardiovascular risk.
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Qasmi et al. (2026) studied Carotid artery stenosis. Severe carotid stenosis (50% and 75% area reduction) vs. Mild carotid stenosis (25% area reduction) was evaluated on Outlet pressure fluctuation and wall shear stress (WSS) distribution. Increasing carotid stenosis severity from 25% to 75% progressively deepened systolic outlet pressure dips below the 111.99 kPa baseline and amplified both throat peak wall shear stress and downstream low-shear zones.
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