Late-window reperfusion in imaging-selected ischemic stroke: interpreting thrombolysis and mechanical thrombectomy trials - Scorecard - MDSpire

Late-window reperfusion in imaging-selected ischemic stroke: interpreting thrombolysis and mechanical thrombectomy trials

  • By

  • Levi Dygert

  • Yidan Shi

  • July 14, 2026

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Clinical Scorecard: Reperfusion Strategies in Imaging-Selected Ischemic Stroke: Analyzing Thrombolysis and Mechanical Thrombectomy Outcomes in the Late Window

At a Glance

CategoryDetail
ConditionIschemic Stroke
Key MechanismsMechanical thrombectomy (MT) and intravenous thrombolysis (IVT) for anterior circulation proximal large-vessel occlusion (LVO) stroke.
Target PopulationImaging-selected patients with anterior circulation LVO treated 6 to 24 hours after last known well time.
Care SettingSystems-of-care framework for late-window stroke management.

Key Highlights

  • MT is superior to medical therapy for anterior circulation proximal LVO stroke.
  • Late-window IVT trials (TRACE-III, HOPE) show benefits in imaging-selected patients.
  • No randomized head-to-head trials exist comparing late-window IVT and MT.
  • Baseline prognosis and occlusion site significantly affect treatment outcomes.
  • Treated-arm outcomes should be interpreted within each trial context.

Guideline-Based Recommendations

Diagnosis

  • Identify anterior circulation proximal LVO using imaging.

Management

  • Consider MT for eligible patients within 6 to 24 hours of LKW.
  • Use IVT when MT is unavailable or delayed.

Monitoring & Follow-up

  • Assess functional independence using modified Rankin Scale (mRS) at 90 days.

Risks

  • Monitor for symptomatic intracranial hemorrhage (sICH) and mortality.

Patient & Prescribing Data

Patients with anterior circulation LVO, treated 6 to 24 hours after LKW.

Outcomes vary significantly based on baseline stroke severity and occlusion characteristics.

Clinical Best Practices

  • Evaluate treatment efficacy by comparing outcomes within the same trial.
  • Avoid informal comparisons of treated-arm outcomes across different trials.

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