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Related Concept Videos

Atherosclerosis I: Introduction01:30

Atherosclerosis I: Introduction

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Atherosclerosis is a progressive disorder characterized by the buildup of plaques on the arterial inner wall, causing them to narrow and harden over time. These plaques comprise lipids, calcium, blood components, carbohydrates, and fibrous tissue. The process primarily affects the intima of large and medium-sized arteries, reducing blood flow in any artery.Etiology and risk factorsThe cause of atherosclerosis is multifactorial, involving a complex interplay among endothelial injury, lipid...
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Atherosclerosis II: Clinical Manifestations and Diagnostic Tests01:27

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Atherosclerosis is a progressive disorder that leads to the thickening and narrowing of arterial walls due to plaque buildup. This condition can cause various symptoms depending on the arteries affected:Coronary Artery Disease (CAD): This condition affects the coronary arteries and may lead to chest pain (angina), shortness of breath (dyspnea), heart attacks, and other heart disease symptoms.Cerebrovascular Disease: This affects blood flow to the brain, causing transient ischemic attacks (TIAs)...
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Coronary Artery Disease (CAD) originates from a series of events that impair the function of coronary arteries, the blood vessels responsible for delivering oxygen-rich blood to the heart muscle. The pathophysiology of CAD is closely linked to atherosclerosis, a chronic inflammatory and lipid-driven condition affecting the vascular endothelium.1. Endothelial DamageThe process begins with damage to the vascular endothelium, which serves as a protective barrier between the blood and the vessel...
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The human body's intricate network of arteries ensures that every organ system receives the necessary oxygen and nutrients for optimal function. The arterial network in the head and neck region is particularly complex, providing vital blood flow to the brain, eyes, and other critical structures. Prominent arteries in this region include the internal carotid arteries and the vertebral arteries.
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Stroke: Introduction and Types01:29

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A stroke is an acute neurological event caused by the sudden disruption of cerebral blood flow, leading to rapid loss of neuronal function. Neurons depend on continuous oxygen and glucose supply, so even brief interruptions can cause irreversible injury within minutes. Strokes are classified into ischemic and hemorrhagic types.Ischemic StrokeIschemic strokes are most common and occur due to arterial occlusion, depriving brain tissue of oxygen and nutrients. This leads to energy failure, ionic...
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Related Experiment Video

Updated: Apr 24, 2026

A Magnetic Resonance Imaging-based Computational Protocol for Analysis of Plaque Morphology and Hemodynamics in Patients with Carotid Artery Stenosis
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A Magnetic Resonance Imaging-based Computational Protocol for Analysis of Plaque Morphology and Hemodynamics in Patients with Carotid Artery Stenosis

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Carotid plaque hemodynamics.

Andreas Harloff1

  • 1Department of Neurology, University Hospital Freiburg, Freiburg, Germany.

Interventional Neurology
|September 5, 2014
PubMed
Summary

Internal carotid artery (ICA) plaques can cause stroke. New research highlights plaque composition and blood flow dynamics as key, independent risk factors for plaque rupture and stroke.

Area of Science:

  • Cardiovascular Research
  • Neurology
  • Medical Imaging

Background:

  • Internal carotid artery (ICA) plaques are a primary cause of embolic events in the brain and retina.
  • Current guidelines focus on stenosis degree and cardiovascular risk factors, with limited attention to plaque characteristics.
  • Plaque ulceration, identified via angiography, increases stroke recurrence risk, even with moderate stenosis.

Purpose of the Study:

  • To review current evidence on the correlation between plaque location, composition, and local hemodynamics at the carotid artery bifurcation.
  • To discuss the potential for a comprehensive, individualized risk assessment for carotid artery disease.
  • To explore the role of plaque morphology, motion, vascularization, and hemodynamics as independent risk factors for plaque rupture.

Main Methods:

Keywords:
Carotid arteryRuptureTensile stressVulnerable plaqueWall shear stress

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  • Review of existing literature and clinical trial data.
  • Analysis of imaging techniques including ultrasound, CT, and multi-contrast MRI for plaque characterization.
  • Discussion of biomechanical factors like wall shear stress and tensile plaque stress.

Main Results:

  • Multi-contrast MRI shows promise for identifying rupture-prone plaque compositions due to high soft tissue contrast.
  • Animal models demonstrate that wall shear stress can induce atherosclerosis and vulnerable plaques.
  • Plaque movement and tensile stress models aid in identifying vulnerable regions susceptible to rupture.

Conclusions:

  • Plaque composition, motion, vascularization, and local hemodynamics are critical, underappreciated factors in plaque rupture and stroke risk.
  • Advanced imaging and biomechanical modeling offer potential for improved risk stratification.
  • Future research should focus on validating these factors in large clinical trials for personalized risk assessment.