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Updated: Jul 21, 2025
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A Fibrin-Enriched and tPA-Sensitive Photothrombotic Stroke Model
Published on: June 4, 2021
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The Pathophysiology of Collateral Circulation in Acute Ischemic Stroke
Marilena Mangiardi1, Adriano Bonura2, Gianmarco Iaccarino2
1Department of Stroke Unit, San Camillo-Forlanini Hospital, 00152 Rome, Italy.
Diagnostics (Basel, Switzerland)
|July 29, 2023
Summary
Cerebral collateral circulation stabilizes blood flow during ischemic stroke. Better collaterals improve reperfusion therapy outcomes and reduce stroke severity.
Area of Science:
- Neurology
- Vascular Biology
- Medical Imaging
Background:
- Cerebral collateral circulation is a critical vascular network that maintains brain perfusion during arterial occlusion.
- Adequate collateral flow significantly influences the extent of the ischemic penumbra and salvageable brain tissue.
- The quality of collateral circulation is a key determinant of patient outcomes following acute ischemic stroke.
Purpose of the Study:
- To review the pathophysiology of cerebral collateral circulation in acute ischemic stroke.
- To discuss the clinical significance and prognostic implications of collateral status.
- To explore the role of advanced neuroimaging in assessing collateral networks and guiding therapeutic decisions.
Main Methods:
- This narrative review synthesizes current literature on cerebral collateral circulation.
- Key findings from studies utilizing CT angiography and MRI techniques are discussed.
- Pathophysiological mechanisms and clinical evidence are critically evaluated.
Main Results:
- The extent of collateral circulation directly correlates with the volume of the ischemic penumbra.
- Effective collateralization enhances the efficacy of reperfusion therapies like thrombolysis and thrombectomy.
- Improved collateral flow is associated with better functional outcomes, reduced infarct size, and fewer complications.
Conclusions:
- Cerebral collateral circulation plays a pivotal role in mitigating ischemic stroke damage.
- Advanced imaging techniques are crucial for evaluating collateral status and optimizing treatment strategies.
- Understanding and assessing collateral networks are essential for improving patient management in acute ischemic stroke.
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