The Alberta Stroke Program Early CT Score in clinical practice: what have we learned?

Area of Science:

• Neurology
• Radiology
• Medical Imaging

Background:

• Computed tomography (CT) revolutionized acute ischemic stroke treatment by enabling differentiation from hemorrhagic stroke, making thrombolytic therapy feasible.
• The Alberta Stroke Program Early CT Score (ASPECTS) was developed to systematically quantify early ischemic changes in the middle cerebral artery (MCA) territory on noncontrast CT.
• Accurate assessment of early ischemic changes and ASPECT scoring require specialized training.

Purpose of the Study:

• To review the methodology of the Alberta Stroke Program Early CT Score.
• To illustrate current knowledge of ASPECTS application in clinical trials.
• To discuss how ASPECTS can inform clinical treatment decisions and future trial design.

Main Methods:

• Review of existing literature and clinical trial data concerning the Alberta Stroke Program Early CT Score.
• Illustration of ASPECTS methodology for quantifying early ischemic changes on noncontrast CT.
• Introduction of a modified ASPECTS methodology excluding isolated cortical swelling.

Main Results:

• The Alberta Stroke Program Early CT Score is a reliable and simple tool for assessing early ischemic changes.
• ASPECTS is a strong predictor of functional outcomes in acute ischemic stroke patients.
• The effectiveness of intra-arterial thrombolysis for MCA occlusion is modified by ASPECTS.

Conclusions:

• The Alberta Stroke Program Early CT Score is crucial for guiding acute stroke treatment and predicting patient outcomes.
• A modified ASPECTS, which excludes isolated cortical swelling, may refine the assessment of early ischemic changes.
• ASPECTS facilitates clinical decision-making and can inform the design of future stroke clinical trials.