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Related Concept Videos

Vascular Spasm01:16

Vascular Spasm

The vascular phase, also known as vasospasm, is the initial stage of hemostasis, crucial for preventing excessive bleeding when a blood vessel is injured. After a vessel is cut, nerves in the damaged area trigger pain and other sensory impulses. Simultaneously, the smooth muscles in the vessel wall contract, resulting in a vascular spasm. This contraction reduces the vessel's diameter at the injury site, slowing or stopping blood loss through the vessel wall. Vascular spasms typically last for...
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Arteries of the Head and Neck

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.
The internal carotid arteries supply blood to the anterior portion of the cerebrum. They enter the...

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Vasodilation in spontaneous cervical artery dissection.

C Lucas1, D Leys

  • 1Department of Neurology, Lille University Hospital, Lille, France.

Frontiers of Neurology and Neuroscience
|February 10, 2007
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Spontaneous cervical artery dissection (CAD) in young adults is linked to impaired endothelium-dependent vasodilation, suggesting an underlying arterial wall abnormality. This vascular dysfunction may predispose individuals to CAD, even without apparent causes.

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Published on: July 28, 2018

Area of Science:

  • Vascular Medicine
  • Neurology
  • Cardiology

Background:

  • Cervical artery dissection (CAD) is a significant cause of ischemic stroke in young adults.
  • While trauma and arterial wall disorders are known causes, most CAD cases are spontaneous.
  • The underlying mechanisms of spontaneous CAD remain incompletely understood.

Purpose of the Study:

  • To investigate the hypothesis that spontaneous CAD may stem from a subclinical systemic vascular disease.
  • To assess endothelium-dependent vasodilation in patients with spontaneous CAD.
  • To determine if impaired vasodilation is a predisposing factor for CAD.

Main Methods:

  • Sixty-five patients with spontaneous CAD (26 internal carotid artery dissection, 39 vertebral artery dissection) were studied.
  • Exclusion criteria included vascular risk factors, trauma, and connective tissue diseases.
  • High-resolution ultrasonography measured brachial artery diameter changes during flow-mediated and glyceryl trinitrate-induced dilation, compared to 23 stroke controls.

Main Results:

  • Flow-mediated, endothelium-dependent vasodilation was significantly impaired in CAD patients (5.7% ICAD, 5.0% VAD) compared to controls (13.2%).
  • No significant difference in vasodilation was observed between internal carotid artery dissection and vertebral artery dissection groups.
  • Endothelium-independent vasodilation (glyceryl trinitrate response) showed no significant differences across all groups.

Conclusions:

  • Impaired endothelium-dependent vasodilation is evident in spontaneous CAD patients.
  • This vascular dysfunction is not a consequence of the stroke itself.
  • Findings suggest an underlying arterial wall abnormality may predispose individuals to CAD.