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Perfusion Defects and Collateral Flow Patterns in Acute Small Subcortical Infarction: a 4D Dynamic MRI Study.
Yen-Chu Huang1, Jiann-Der Lee1, Yi-Ting Pan1
1Department of Neurology, Chang Gung Memorial Hospital at Chiayi, Chang-Gung University College of Medicine, Chiayi County, Taiwan.
Translational Stroke Research
|October 14, 2021
Summary
Hemodynamic changes in acute small subcortical infarction (SSI) impact outcomes. Collaterals play a critical role in maintaining cerebral perfusion and influencing patient clinical outcomes in acute stroke.
Area of Science:
- Neurology
- Radiology
- Cardiovascular Science
Background:
- Hemodynamic changes in acute small subcortical infarction (SSI) are not well understood.
- Perfusion magnetic resonance imaging (MRI) is crucial for evaluating these changes.
Purpose of the Study:
- To evaluate hemodynamic changes and collateral status in acute SSI using perfusion MRI.
- To correlate perfusion patterns and collateral development with clinical outcomes.
Main Methods:
- 103 patients with acute SSI underwent 4D dynamic perfusion MRI within 24 hours of stroke onset.
- Patients were categorized into normal perfusion, compensated perfusion, and hypoperfusion patterns.
- Anterograde and retrograde collateral development was assessed.
Main Results:
- Hypoperfusion pattern was associated with higher early neurological deterioration, larger infarct volumes, lower cerebral blood flow, and fewer collaterals.
- Anterograde collaterals correlated with higher cerebral blood volume and deep microbleeds.
- Retrograde collaterals were linked to higher blood pressure, smaller infarcts, and lobar microbleeds.
Conclusions:
- Both anterograde and retrograde collaterals are vital for maintaining cerebral perfusion in acute SSI.
- Collateral status significantly impacts patient clinical outcomes.
- Further research is needed to explore effective treatments for acute SSI.
