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Journal ArticleDOI

Collateral blood vessels in acute ischaemic stroke: a potential therapeutic target

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TLDR
Imaging of the brain and vessels has shown that collateral flow can sustain brain tissue for hours after the occlusion of major arteries to the brain, and the augmentation or maintenance of collateral flow is therefore a potential therapeutic target.
Abstract
Summary Ischaemic stroke results from acute arterial occlusion leading to focal hypoperfusion. Thrombolysis is the only proven treatment. Advanced neuroimaging techniques allow a detailed assessment of the cerebral circulation in patients with acute stroke, and provide information about the status of collateral vessels and collateral blood flow, which could attenuate the effects of arterial occlusion. Imaging of the brain and vessels has shown that collateral flow can sustain brain tissue for hours after the occlusion of major arteries to the brain, and the augmentation or maintenance of collateral flow is therefore a potential therapeutic target. Several interventions that might augment collateral blood flow are being investigated.

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Journal ArticleDOI

Oleic Acid Increases Synthesis and Secretion of VEGF in Rat Vascular Smooth Muscle Cells: Role of Oxidative Stress and Impairment in Obesity

TL;DR: In VSMC from OZR, which present enhanced baseline oxidative stress, the above mentioned actions of OA on VEGF-A, signaling pathways and ROS are impaired: this impairment is reproduced inVSMC from LZR by incubation with hydrogen peroxide.
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FLAIR vascular hyperintensities and dynamic 4D angiograms for the estimation of collateral blood flow in posterior circulation occlusion.

TL;DR: In posterior circulation occlusion, FVH is a frequent finding, but its prognostic value is limited; Dynamic 4D angiograms are advantageous to examine and graduate collateral blood flow and might have prognostic relevance.
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Collateral Flow and Brain Changes on Computed Tomography Angiography Predict Infarct Volume on Early Diffusion-weighted Imaging

TL;DR: Assessment of ASPECTS and collateral flow on CTA-SI may be able to exclude a patient with large infarct on early DWI, and predicted absence of a largeinfarct with a sensitivity of .89, specificity of 1.00, and negative predictive value of .71.
Journal ArticleDOI

Endovascular Therapy for Acute Ischemic Stroke of Intracranial Atherosclerotic Origin-Neuroimaging Perspectives.

TL;DR: Patients with ICAS-LVO may have different anatomic, hemodynamic, and pathophysiologic features on neuroimaging compared to patients with embolic LVO, which have clinical implications with respect to determination of EVT responses.
Journal ArticleDOI

Infarct Evolution in a Large Animal Model of Middle Cerebral Artery Occlusion

TL;DR: It is shown that the dog middle cerebral artery occlusion model recapitulates this key aspect of human stroke rendering it a highly desirable model to develop novel multimodal treatments to improve clinical outcomes and provides proof-of-concept that MRI perfusion-based time-to-peak maps can be utilized to predict the rate of infarct growth.
References
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Journal ArticleDOI

Classification of subtype of acute ischemic stroke. Definitions for use in a multicenter clinical trial. TOAST. Trial of Org 10172 in Acute Stroke Treatment

TL;DR: The TOAST stroke subtype classification system is easy to use and has good interobserver agreement and should allow investigators to report responses to treatment among important subgroups of patients with ischemic stroke.
Journal ArticleDOI

Thresholds in cerebral ischemia - the ischemic penumbra.

J Astrup, +2 more
- 01 Nov 1981 - 
TL;DR: Recent evidence indicates that immediate failure of basic functions such as synaptic transmission, ion pumping and energy metabolism in the ischemic brain, is critically dependent on residual blood flow, and that these functions fail at certain critical flow thresholds.
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