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A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia
06:01

A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia

Published on: August 18, 2015

Clot fragments formed from original thrombus obstruct downstream arteries in the ischemic injured brain

Chen Xu Wang1, Tao Yang, Ashfaq Shuaib

  • 1Stroke Research Laboratory, University of Alberta, Edmonton, Alberta, Canada.

Microcirculation (New York, N.Y. : 1994)
|April 22, 2006
PubMed

Insights

Fragmenting clots after middle cerebral artery (MCA) occlusion cause downstream blockages, leading to persistent perfusion deficits. This study clarifies the mechanism of arterial occlusion following thrombus dissolution.

Area of Science:

  • Neuroscience
  • Cerebrovascular Research
  • Ischemic Stroke Pathophysiology

Background:

  • Embolic occlusion of the middle cerebral artery (MCA) causes distal perfusion deficits during recanalization.
  • The precise mechanisms underlying these perfusion deficits remain incompletely understood.

Purpose of the Study:

  • To investigate whether distal fragment migration from dissolved thrombi contributes to perfusion deficits.
  • To elucidate the mechanisms of downstream arterial occlusion after thrombus dissolution.

Main Methods:

  • Assessed perfusion deficits in transient vs. permanent MCA occlusion models.
  • Quantified fragment formation from embolized clots.
  • Examined urokinase plasminogen activator expression in ischemic brain tissue.

Main Results:

  • Permanent MCA occlusion led to persistent, large ipsilateral perfusion deficits.
  • Transient MCA occlusion showed significant reduction in perfusion deficits.
  • Increased clot fragment formation and urokinase plasminogen activator expression were observed post-MCA occlusion.

Conclusions:

  • Downstream arterial occlusion following thrombus dissolution is a key mechanism contributing to perfusion deficits.
  • Fragment migration plays a significant role in the pathophysiology of MCA occlusion.
Abstract

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