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Optimized Management of Endovascular Treatment for Acute Ischemic Stroke
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Acute Management of Medium Vessel Occlusion Stroke: New Evidence and a Path Forward

William K Diprose1,2, Umberto Pensato3,4, Mohammed Almekhlafi5

  • 1Faculty of Medical and Health Sciences, Department of Medicine, University of Auckland, New Zealand (W.K.D.).

Stroke
|November 14, 2025
PubMed

Insights

Medium vessel occlusion stroke (MeVO) affects many patients, but endovascular thrombectomy (EVT) shows no clear benefit over best medical care. Further research is needed to identify patient subgroups who may benefit from EVT.

Area of Science:

  • Neurology
  • Interventional Neurology
  • Vascular Neurology

Background:

  • Medium vessel occlusion (MeVO) stroke constitutes a significant portion (25-40%) of acute ischemic strokes.
  • MeVO stroke is linked to considerable patient morbidity, even with optimal medical management.
  • Current treatment paradigms for MeVO stroke require further investigation and potential improvement.

Purpose of the Study:

  • To review the clinical and imaging characteristics of MeVO stroke.
  • To evaluate the existing evidence for both medical and endovascular treatments for MeVO stroke.
  • To discuss recent clinical trial outcomes and propose future research directions for MeVO stroke.

Main Methods:

  • Systematic review of clinical and imaging features of MeVO stroke.
  • Analysis of published and ongoing clinical trials investigating endovascular thrombectomy (EVT) for MeVO stroke.
  • Discussion of preliminary post hoc analyses identifying potential patient subgroups benefiting from EVT.

Main Results:

  • Recent trial results indicate no significant difference in outcomes between EVT and best medical management for MeVO stroke.
  • Some trials suggest a potential for harm with EVT in MeVO stroke patients.
  • Preliminary analyses suggest specific patient subgroups might benefit from EVT.

Conclusions:

  • Current evidence does not strongly support the routine use of EVT for MeVO stroke.
  • Further research is essential to refine EVT techniques, identify optimal adjunctive treatments, and pinpoint patient subgroups who may benefit.
  • Future trials should focus on these areas to improve outcomes for MeVO stroke patients.
Keywords:
ischemiaischemic strokemiddle cerebral arterymorbidityprognosis

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