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Related Experiment Video

Updated: Dec 4, 2025

A Magnetic Resonance Imaging-based Computational Protocol for Analysis of Plaque Morphology and Hemodynamics in Patients with Carotid Artery Stenosis
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Dynamic carotid plaque imaging using ultrasonography.

Argyrios A Giannopoulos1, Efthyvoulos Kyriacou2, Maura Griffin3

  • 1Department of Vascular Surgery, Faculty of Medicine, Imperial College London, London, United Kingdom; Department of Vascular Surgery, University College London Hospital, London, United Kingdom.

Journal of Vascular Surgery
|October 22, 2020
PubMed
Summary
This summary is machine-generated.

Carotid plaque motion analysis reveals discordant motion is common in symptomatic plaques. This finding, measured by maximum angular spread (MAS), can help predict stroke risk in asymptomatic individuals.

Keywords:
Atherosclerotic carotid plaqueConcordantDiscordantMotion analysisUltrasound

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Area of Science:

  • Vascular imaging
  • Biomedical engineering
  • Cardiovascular research

Background:

  • Carotid plaque motion can be concordant or discordant.
  • Discordant motion involves different plaque parts moving in different directions.
  • Understanding plaque motion is crucial for assessing stroke risk.

Purpose of the Study:

  • Determine the prevalence of discordant plaque motion in symptomatic vs. asymptomatic carotid plaques.
  • Develop a metric to quantify the severity of discordant plaque motion.
  • Correlate the severity of discordant motion with symptom prevalence.

Main Methods:

  • Analyzed video recordings of 204 carotid plaques (50%-99% stenosis) from 200 patients.
  • Used Farneback's method for video tracking and calculated maximum angular spread (MAS) in degrees.
  • Classified plaques as concordant (MAS <70°), moderately discordant (MAS 70°-120°), or discordant (MAS >120°).

Main Results:

  • Discordant motion was found in 89.1% of symptomatic plaques vs. 17.9% of asymptomatic plaques (P < .001).
  • Symptom prevalence increased with higher MAS.
  • A MAS >120° indicated a 47.7-fold increased hazard ratio for symptoms, with high accuracy in predicting symptoms (AUC 0.876).

Conclusions:

  • Discordant carotid plaque motion is highly prevalent in symptomatic plaques.
  • Maximum angular spread (MAS) effectively quantifies discordant motion and predicts symptom presence.
  • MAS may identify asymptomatic plaques at increased risk for stroke, warranting prospective validation.