An interventional study of Endovascular Treatment and Best Medical Treatment in Stroke, Cerebrovascular Disorders and Brain Diseases, sponsored by The Second Hospital of Anhui Medical University. Recruiting at 1 site in China. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2025-05-14.
Sponsored by The Second Hospital of Anhui Medical University · Not applicable, Interventional, and Treatment
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.
This study is a multicenter, prospective, randomized, open-label, blinded end-point (PROBE) trial. Eligible participants will be adults (age >18 years) presenting with acute ischemic stroke (AIS) due to anterior circulation large vessel occlusion (LVO), either 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. Participants who meet all inclusion criteria and none of the exclusion criteria will be randomly assigned in a 1:1 ratio to one of two treatment arms. The control group will receive best medical management alone, while the intervention group will receive best medical management in combination with endovascular therapy (EVT). EVT procedures may include mechanical thrombectomy, aspiration thrombectomy, intra-arterial thrombolysis, angioplasty, or stenting, as deemed appropriate by the treating physician.
The primary objective of the study is to evaluate the safety and efficacy of EVT in patients presenting with AIS due to anterior circulation LVO beyond 24 hours from symptom onset. The primary endpoint is functional independence at 90 days, defined as a score of 0-2 on the modified Rankin Scale (mRS).
2,612 studies on the registry are indexed under Ischemic Stroke; 971 are open to participants now.
This study's planned enrollment of 432 is above the median of 120 across 1,776 interventional studies indexed under Ischemic Stroke.
Browse Ischemic Stroke studies →The Second Hospital of Anhui Medical University is the lead sponsor of 30 studies on the registry; 18 are open to participants now.
Compared within Ischemic Stroke, this study's primary condition as ClinicalTrials.gg classifies it; the registry's first condition term is Stroke. The counts are of registry records indexed under each term, refreshed daily. How we classify →
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Meet one of the following imaging criteria:
Exclusion criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.
Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.
Blood tests of how long blood takes to clot. The INR is the prothrombin time (PT) put on a common scale; about 1 is usual for someone not taking a blood thinner.
Criteria often make an exception for people on a blood thinner such as warfarin, whose INR is raised on purpose.
Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.
The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraindication
A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Platelets
Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
INR, PT and aPTT (clotting tests)
Blood tests of how long blood takes to clot. The INR is the prothrombin time (PT) put on a common scale; about 1 is usual for someone not taking a blood thinner.
Criteria often make an exception for people on a blood thinner such as warfarin, whose INR is raised on purpose.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Relapsed and refractory
Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Life expectancy
The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Patients in this group will receive endovascular therapy (EVT) plus best medical treatment.
Procedure: Endovascular Treatment · Drug: Best Medical Treatment
Patients in this group will receive standard medical therapy in accordance with the guideline-directed management for acute ischemic stroke.
Drug: Best Medical Treatment
EVT procedures may include mechanical thrombectomy, intra-arterial thrombolysis, balloon angioplasty, or stenting, or other intra-arterial procedures as deemed appropriate by the treating physician.
Patients in this group will receive standard medical therapy in accordance with the guideline-directed management for acute ischemic stroke.
Functional independence
The proportion of patients achieving functional independence, defined as a modified Rankin Scale (mRS) score of 0-2 at 90 ± 7 days. The mRS is a widely used 6-point scale for assessing disability and functional outcomes after stroke, where higher scores represent worse outcomes.
Time frame: 90 ± 7 days
Ordinal distribution of mRS
Ordinal distribution of the modified Rankin Scale (mRS) at 90 ± 7 days. The mRS is a widely used 6-point scale for assessing disability and functional outcomes after stroke, where higher scores represent worse outcomes.
Time frame: 90 ± 7 days
Excellent functional outcome
Number of participants achieving an excellent functional outcome, defined as a modified Rankin Scale (mRS) score of 0-1 at 90 ± 7 days follow-up. The mRS is a widely used 6-point scale for assessing disability and functional outcomes after stroke, where higher scores represent worse outcomes.
Time frame: 90 ± 7 days
Poor functional outcome
Number of participants achieving a poor functional outcome, defined as a modified Rankin Scale (mRS) score of 4-6 at 90 ± 7 days follow-up. The mRS is a widely used 6-point scale for assessing disability and functional outcomes after stroke, where higher scores represent worse outcomes.
Time frame: 90 ± 7 days
Early neurological deterioration
The proportion of patients with an increase of ≥ 4 points in the National Institutes of Health Stroke Scale (NIHSS) score, within 24 ± 12 hours post-randomization. The NIHSS is a standardized 11-item assessment tool designed to quantify neurological deficits in patients with acute stroke. The total score ranges from 0 to 42, with higher values indicating more severe deficits.
Time frame: 24 ± 12 hours
Any neurological improvement
The proportion of patients with a reduction of ≥ 2 points in the National Institutes of Health Stroke Scale (NIHSS) score from baseline at 24 ± 12 hours post-randomization. The NIHSS is a standardized 11-item assessment tool designed to quantify neurological deficits in patients with acute stroke. The total score ranges from 0 to 42, with higher values indicating more severe deficits.
Time frame: 24 ± 12 hours
Early neurological improvement
The proportion of patients with a reduction of ≥ 4 points in the National Institutes of Health Stroke Scale (NIHSS) score from baseline at 24 ± 12 hours post-randomization. The NIHSS is a standardized 11-item assessment tool designed to quantify neurological deficits in patients with acute stroke. The total score ranges from 0 to 42, with higher values indicating more severe deficits.
Time frame: 24 ± 12 hours
Any new ischemic stroke events
Any new ischemic stroke events within 3 months
Time frame: 3 months
Any ischemic stroke event or revascularization
Any ischemic stroke event or revascularization of the culprit vessel between 3 and 12 months post-randomization.
Time frame: 3-12 months
Symptomatic intracranial hemorrhage
The incidence of symptomatic intracranial hemorrhage within 24 ± 12 hours post-randomization.
Time frame: 24 ± 12 hours
All cause mortality
All cause mortality at 90 ± 7 days.
Time frame: 90 ± 7 days
Plan to share: Undecided
No publications or documents are linked to this record.
Started Mar 2025 (actual). Primary completion is estimated for Dec 2029, 57 months after the start.
Of 572 non-industry interventional studies with no phase under Ischemic Stroke, half reached primary completion within 28 months of starting (the median), counting those still running; a quarter within 14 and three quarters within 48. This study's planned 57 months is above that.
Counting every sponsor, half of 653 studies reached it within 27 months; a quarter within 14 and three quarters within 48.
How these figures are worked out, and which studies are left out of them.
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The Second Hospital of Anhui Medical University