[Imaging-based indications for interventional treatment of stroke]

Area of Science:

• Neurology
• Interventional Radiology
• Vascular Medicine

Context:

• Mechanical thrombectomy is a key treatment for acute ischemic stroke caused by large vessel occlusion.
• Determining the optimal window and patient selection criteria, particularly regarding ischemic extent, remains an area of active research.
• Current guidelines often rely on ASPECTS scores, but the precise limits for intervention are debated.

Purpose:

• To clarify the indications for mechanical thrombectomy in acute ischemic stroke.
• To define the role of imaging biomarkers, such as ASPECTS scores, in guiding endovascular treatment decisions.
• To assess the necessity of advanced imaging techniques for treatment selection within the early hours of stroke onset.

Summary:

• Mechanical thrombectomy is indicated for proximal vessel occlusions when extensive ischemic damage is absent.
• A benefit is reliably expected with an ASPECTS score of 6-10, and potentially lower scores.
• Advanced imaging like collateral assessment or perfusion studies is generally not required for clinical decisions within the first 6 hours.

Impact:

• Provides clearer guidance on patient selection for mechanical thrombectomy, potentially improving treatment outcomes.
• Highlights the continued importance of clinical assessment and basic imaging (ASPECTS) in acute stroke management.
• Suggests that complex imaging may not be necessary for timely endovascular intervention, streamlining treatment pathways.