Endovascular Treatment Beyond 24 Hours for Acute Ischemic Stroke Caused by Anterior Circulation Large Vessel Stenosis

Recruiting now · Not applicable

Conditions studied: Stroke, Cerebrovascular Disorders, Brain Diseases, Nervous System Diseases, Vascular Diseases, Ischemic Stroke, Infarction

In brief

Endovascular therapy (EVT) is currently recommended as the first-line treatment for patients with acute large vessel occlusion (LVO) in the anterior circulation within 24 hours of symptom onset. However, the therapeutic benefit of EVT beyond 24-hour window remains uncertain due to limited evidence. The EVT-BELATED trial is a multicenter, prospective, randomized, open-label, blinded end-point (PROBE) study designed to assess the safety and efficacy of EVT in patients with acute ischemic stroke (AIS) caused by anterior circulation LVO presenting beyond 24 hours after symptom onset.

Key facts

Study ID: NCT06959199
Run by: The Second Hospital of Anhui Medical University
People needed: 432
Starts: 2025-03-24
Expected to finish: 2029-12-30
Last updated by the study team: 2025-05-14

Who can join

Age: 18 and older. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

Age > 18 years
Acute ischemic stroke with a time window of 24 to 120 hours from symptom onset or last known well, or progressive ischemic stroke with a time from symptom onset of 24 hours to 7 days (A ≥4-point increase in NIHSS attributable to the culprit vessel territory )
NIHSS score 5-25
Occlusion or ≥70% stenosis of the internal carotid artery or the M1/M2 segment of the middle cerebral artery, confirmed by CTA, MRA, or DSA, and deemed to be the culprit vessel responsible for the clinical presentation of acute ischemic stroke
Meet one of the following imaging criteria:
MRI-based criteria: the infarct volume on DWI is less than one-third of the MCA territory, with evidence of DWI-FLAIR mismatch or MR perfusion showing a core infarct volume ≤30 ml, a mismatch ratio ≥1.8, and a mismatch volume ≥15 ml;
CTA-based criteria: good collateral circulation on the affected side defined ascollateral filling >50% of the MCA territory (Tan score ≥2) and an ASPECTS score ≥6);
CTP-based criteria: ischemic core volume ≤30 ml, mismatch ratio ≥ 1.8, and mismatch volume ≥ 15mL
Signed informed consent obtained

You may not qualify if…

Pre-stroke mRS ≥ 2
Patients unable to undergo vascular imaging
Patients with known allergies to iodine contrast agents, anesthetics, or any contraindication to endovascular treatment
Prior endovascular therapy performed after the index stroke event during the current hospitalization
Intracranial hemorrhage identified on initial imaging
Platelet count <50×10⁹/L, or presence of a known hemorrhagic diathesis , coagulation factor deficiencies, or use of oral anticoagulation therapy with an International Normalized Ratio (INR) > 3.0
Refractory hypertension, defined as sustained systolic blood pressure >200 mmHg or diastolic blood pressure >120 mmHg despite optimal medical management
History of intracranial hemorrhage within the past 3 months, including parenchymal hemorrhage, intraventricular hemorrhage, subarachnoid hemorrhage, epidural hemorrhage, or subdural hemorrhage
Significant mass effect with midline shift confirmed by CT or MRI
Suspected cardioembolic stroke or stroke due to non-atherosclerotic etiologies, such as:arterial dissection,Moyamoya disease, Infective endocarditis, or Immune-mediated vasculitis
Prior intracranial stent placement in the same culprit vessel
Major surgery performed within the past 30 days
Pregnant or current breastfeeding
Presence of severe systemic comorbidities with a life expectancy of less than 3 months
Deemed unsuitable for participation by the investigator for any reason

Where it is running

The Second (Affiliated) Hospital of Anhui Medical University — Hefei, Anhui, China (enrolling)

Full record on ClinicalTrials.gov

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