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Updated: Jan 27, 2026

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Impact of Vessel Narrowing and Changes in Blood Flow on the Development of Ischemia in Cervical Arterial Dissection

Laura Stone McGuire1, James S Ryoo2, Sepideh Amin Hanjani1

  • 1Department of Neurosurgery University of Illinois at Chicago Chicago IL.

Stroke (Hoboken, N.J.)
|January 26, 2026
PubMed

Insights

Cervical arterial dissection can lead to ischemic stroke. Lower blood flow and vessel narrowing in patients with dissection are associated with a higher risk of cerebral ischemia, highlighting the importance of hemodynamic assessment.

Area of Science:

  • Neurology
  • Radiology
  • Vascular Medicine

Background:

  • Cervical arterial dissection accounts for up to 3% of ischemic strokes.
  • Cerebral hemodynamic patterns in cervical arterial dissection and their link to ischemia are not well understood.

Purpose of the Study:

  • To assess cerebral blood flow using quantitative magnetic resonance angiography (MRA) in patients with cervical arterial dissection.
  • To investigate the association between hemodynamic patterns and cerebral ischemia in these patients.

Main Methods:

  • Retrospective review of 37 patients with internal carotid artery or vertebral artery dissection (2009-2019).
  • Quantitative MRA was used to evaluate blood flow, calculating a flow index (ipsilateral flow/contralateral flow).
  • Analysis included assessment of vessel narrowing and its correlation with ischemia on MRI.

Main Results:

  • Patients with ischemia showed significantly lower ipsilateral vessel flow compared to those without ischemia (P=0.003).
  • Flow index, percent of total flow, and percent vessel narrowing were significant predictors of ischemia on MRI (AUCs 0.833-0.895, P<0.002).
  • Vessel narrowing was significantly associated with ischemia on MRI (P=0.03).

Conclusions:

  • This is the first study to use quantitative MRA to evaluate blood flow in cervical arterial dissection and its relation to cerebral ischemia.
  • Reduced blood flow due to dissection increases the risk of ischemia, underscoring the role of hemodynamics.
  • Vessel narrowing is a key factor associated with the development of ischemia in cervical arterial dissection.
Abstract

Keywords:
arterial dissectioncerebral blood flowinternal carotid artery dissectionquantitative MR angiographyvertebral artery dissection

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