What does this research mean for the field?

The geometric orientation of carotid artery stenosis interacts with its severity to dictate atherosclerotic progression risk, where upstream-tilted orientations exacerbate early-stage progression at mild severities and downstream-tilted orientations increase plaque vulnerability at moderate severities. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To evaluate how varying stenosis severity and geometric apex orientation influence hemodynamics, arterial wall strain, and disease progression risk in carotid arteries.

September 15, 2026Physical and Engineering Sciences in MedicineOpen Access

Severe carotid stenosis increases plaque vulnerability by producing markedly elevated wall shear stress and deformation.

Q: What is the clinical evidence from this study?

Study design: Other. Population: Carotid Artery Stenosis. Intervention: Stenosis severity and geometric orientation vs. 0% stenosis (healthy geometry). Primary outcome: Time-Averaged Wall Shear Stress (TAWSS) and arterial wall deformation.

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Why the study?

The combined influence of stenosis severity and geometric orientation on atherosclerotic progression in anatomically realistic geometries had not been systematically examined.

Population

8 simulated carotid artery geometries

Comparison

Four stenosis levels (0, 30, 60, and 80%) across three angular orientations

Design

One-way fluid-structure interaction simulation study

Key result

Severe carotid stenoses (60% and 80%) produced markedly elevated time-averaged wall shear stress (20-60 Pa) and prominent wall deformation up to 2.1 mm, increasing plaque vulnerability.

Authors

HPHarshawardhan PatilVirginia Tech AUAlexandrina UntăroiuD-Tech (United States)

Discussion

Member takes

Overview

Severe carotid stenosis simulations indicate geometry-driven hemodynamic risks; leaves open translation to human plaque progression or clinical risk models.

Key Points

To evaluate how varying stenosis severity and geometric apex orientation influence hemodynamics, arterial wall strain, and disease progression risk in carotid arteries.
Simulated blood flow across four stenosis severities (0%, 30%, 60%, and 80%) and three stenotic apex angular orientations using one-way fluid-structure interaction.
Applied the k-omega SST turbulence model for hemodynamics and a Mooney-Rivlin hyperelastic formulation for arterial wall mechanics across eight carotid artery geometries.
Low stenosis levels (0% and 30%) produced regions of low time-averaged wall shear stress (TAWSS ≤ 0.4 Pa) and ~0.8 mm wall deformation, whereas severe stenoses (60% and 80%) induced high throat TAWSS (20–60 Pa) and wall deformation up to 2.1 mm.
Plaque orientation governed progression dynamics, with an upstream tilt amplifying early-stage progression markers at 30% stenosis and a downstream tilt elevating plaque vulnerability at 60% stenosis.

Structured PICO

Population

A computational fluid-structure interaction study evaluating 8 simulated carotid artery geometries with varying stenosis severities and orientations.

Exposure

Simulated stenosis levels (30%, 60%, and 80%) and three angular orientations of the stenotic apex

Comparator

0% stenosis (baseline) and comparison between different severities and orientations

Outcome

Risk of atherosclerotic progression assessed via Time-Averaged Wall Shear Stress (TAWSS), arterial wall deformation, and disturbed flow signatures (Reynolds number, TKE, OSI)surrogate

This fluid-structure interaction study demonstrates that both stenosis severity and geometric orientation significantly alter local hemodynamics and wall mechanics, influencing the risk of atherosclerotic progression.

Limitations

Incorporated 1-way FSI instead of 2-way FSI, which may overestimate wall shear stresses and deformation.
The parameter set of the Mooney-Rivlin solid may be non-unique due to the lack of an all-mode deformation dataset.
The strength of the qualitative assessment of the relative risk of progression is limited by the large increments of stenotic severity employed.

Cite This Study

Patil et al. (2026) studied Carotid Artery Stenosis. Stenosis severity and geometric orientation vs. 0% stenosis (healthy geometry) was evaluated on Time-Averaged Wall Shear Stress (TAWSS) and arterial wall deformation. Severe carotid stenoses (60% and 80%) produced markedly elevated time-averaged wall shear stress (20-60 Pa) and prominent wall deformation up to 2.1 mm, increasing plaque vulnerability.

synapsesocial.com/papers/6aa9017deed42882c1fc1941 https://doi.org/10.1007/s13246-026-01784-6

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September 15, 2026Physical and Engineering Sciences in MedicineOpen Access

Severe carotid stenosis increases plaque vulnerability by producing markedly elevated wall shear stress and deformation.

View Full Paper

Ask AI

Bookmark

Why the study?

The combined influence of stenosis severity and geometric orientation on atherosclerotic progression in anatomically realistic geometries had not been systematically examined.

Population

8 simulated carotid artery geometries

Comparison

Four stenosis levels (0, 30, 60, and 80%) across three angular orientations

Design

One-way fluid-structure interaction simulation study

Key result

Severe carotid stenoses (60% and 80%) produced markedly elevated time-averaged wall shear stress (20-60 Pa) and prominent wall deformation up to 2.1 mm, increasing plaque vulnerability.

Authors

HPHarshawardhan PatilVirginia Tech AUAlexandrina UntăroiuD-Tech (United States)

Discussion

Member takes

Overview

Severe carotid stenosis simulations indicate geometry-driven hemodynamic risks; leaves open translation to human plaque progression or clinical risk models.

Key Points

To evaluate how varying stenosis severity and geometric apex orientation influence hemodynamics, arterial wall strain, and disease progression risk in carotid arteries.
Simulated blood flow across four stenosis severities (0%, 30%, 60%, and 80%) and three stenotic apex angular orientations using one-way fluid-structure interaction.
Applied the k-omega SST turbulence model for hemodynamics and a Mooney-Rivlin hyperelastic formulation for arterial wall mechanics across eight carotid artery geometries.
Low stenosis levels (0% and 30%) produced regions of low time-averaged wall shear stress (TAWSS ≤ 0.4 Pa) and ~0.8 mm wall deformation, whereas severe stenoses (60% and 80%) induced high throat TAWSS (20–60 Pa) and wall deformation up to 2.1 mm.
Plaque orientation governed progression dynamics, with an upstream tilt amplifying early-stage progression markers at 30% stenosis and a downstream tilt elevating plaque vulnerability at 60% stenosis.

Structured PICO

Population

A computational fluid-structure interaction study evaluating 8 simulated carotid artery geometries with varying stenosis severities and orientations.

Exposure

Simulated stenosis levels (30%, 60%, and 80%) and three angular orientations of the stenotic apex

Comparator

0% stenosis (baseline) and comparison between different severities and orientations

Outcome

Risk of atherosclerotic progression assessed via Time-Averaged Wall Shear Stress (TAWSS), arterial wall deformation, and disturbed flow signatures (Reynolds number, TKE, OSI)surrogate

Limitations

Incorporated 1-way FSI instead of 2-way FSI, which may overestimate wall shear stresses and deformation.
The parameter set of the Mooney-Rivlin solid may be non-unique due to the lack of an all-mode deformation dataset.
The strength of the qualitative assessment of the relative risk of progression is limited by the large increments of stenotic severity employed.

Cite This Study

synapsesocial.com/papers/6aa9017deed42882c1fc1941 https://doi.org/10.1007/s13246-026-01784-6

Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

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