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Highest Efficacy of Dual Antiplatelet Therapy After Carotid Artery Stenting in High Bleeding Risk Patients

NCT06276374 · Status: RECRUITING · Phase: NA · Type: INTERVENTIONAL · Enrollment: 1556

Last updated 2026-05-11

No results posted yet for this study

Summary

The optimal duration of dual antiplatelet therapy (DAPT) after carotid artery stenting (CAS) in patients at high bleeding risk (HBR) has not been established in randomized controlled trials. Current practice largely extrapolates from percutaneous coronary intervention (PCI) trials, but anatomical and procedural differences between coronary and carotid arteries limit the validity of this approach.

The CHET trial is a multicenter, randomized, open-label, superiority trial designed to compare two DAPT durations after CAS in patients at HBR. After CAS, all eligible patients receive aspirin (100 mg daily) and clopidogrel (75 mg daily) for a 30-day enrichment period. Patients who remain free of net clinical events at day 30 are randomized 1:1 to either single antiplatelet therapy (SAPT; aspirin 100 mg or clopidogrel 75 mg daily, at the treating physician's discretion) for 11 months, or continued DAPT for 11 months.

The primary hypothesis is that abbreviated DAPT followed by SAPT is superior to prolonged DAPT in reducing clinically significant bleeding (Bleeding Academic Research Consortium \[BARC\] type 2, 3, or 5) from 30 days to 12 months after CAS, while maintaining noninferiority in net clinical outcomes (composite of nonfatal stroke, nonfatal myocardial infarction, cardiovascular death, and major bleeding \[BARC type 3 or 5\]).

A total of 1,556 participants (778 per group) will be enrolled across multiple comprehensive stroke centers in the Republic of Korea. Patients will be followed at 5 and 11 months after randomization, with subsequent annual follow-up (in-person or by telephone) until study completion to capture long-term clinical events.

Conditions

  • Carotid Artery Diseases

Interventions

DRUG

Intervention 1(DAPT): Drug: Aspirin 100mg + Clopidogrel 75mg. Intervention 2(SAPT): Drug: Asprin 100mg or Clopidogrel 75mg

* Arm A : Single antiplatelet therapy (SAPT) with aspirin or clopidogrel \- 1 month of dual antiplatelet therapy(100mg aspirin q.d. and 75mg clopidogrel q.d.)→ Randomization → 11 months of single antiplatelet therapy (100mg aspirin q.d. or 75mg clopidogrel q.d.) * Arm B : Dual antiplatelet therapy (DAPT) with aspirin and clopidogrel - 1 month of dual antiplatelet therapy(100mg aspirin q.d. and 75mg clopidogrel q.d.) → Randomization → 11 months of dual antiplatelet therapy (100mg aspirin q.d. and 75mg clopidogrel q.d.)

Sponsors & Collaborators

  • Dong-A ST Co., Ltd.

    collaborator INDUSTRY

  • Woo-Keun Seo

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Model
PARALLEL

Eligibility

Min Age
19 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2024-07-15
Primary Completion
2029-11-30
Completion
2030-12-31

Countries

  • South Korea

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT06276374 on ClinicalTrials.gov