Combination Antithrombotic Treatment for Prevention of Recurrent Ischemic Stroke in Intracranial Atherosclerotic Disease

Population Health Research Institute (PHRI)

Status and phase: Completed; Phase 3

Conditions: Ischemic Stroke; Intracranial Atherosclerotic Disease

Treatments: Drug: Rivaroxaban 2.5 Mg Oral Tablet bid; Drug: Acetylsalicyclic acid 81 mg tablet qd

Study type: Interventional

Funder types: Other

Identifiers

NCT04142125

CATIS-ICAD

Details and patient eligibility

About

CATIS-ICAD is a clinical pilot study in which patients who have had a recent ischemic stroke, that is a stroke caused by a blood clot or a narrowing of the blood vessels in the brain due to the build up of plaque, will be randomly assigned to receive either low-dose rivaroxaban + aspirin or aspirin alone.

Enrollment: 101 patients

Sex: All

Ages: 40+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

1. Age ≥ 40 years

2. Recent brain ischemia attributed to intracranial atherosclerotic stenosis of 30-99% as evidenced by CT or MR angiography, occurring between 7 to 100 days prior to randomization and consisting of either:

   1. a high-risk TIA defined as TIA with motor and/or speech involvement or
   2. an ischemic stroke

3. Written informed consent consistent with local regulations governing research in human subjects

Exclusion criteria

1. Indication for DAPT for > 90 days on guideline recommendations or investigator ́s judgment; e.g., cardiac stenting.
2. Indication for chronic anticoagulation based on guideline recommendations or investigator ́s judgment; e.g. patient with prosthetic mechanical valve, venous thromboembolism, hypercoagulable state
3. Atrial fibrillation or a history of atrial fibrillation
4. Intracranial arterial occlusion (e.g. 100% stenosis) responsible for the acute brain ischemia
5. Intracranial arterial stenosis secondary to causes other than atherosclerosis
6. Extracranial carotid artery disease ipsilateral to the qualifying brain ischemia with a plan for carotid revascularization
7. Intraluminal thrombus
8. Subdural hematoma within 12 months of randomization
9. Previous spontaneous hemorrhagic stroke (e.g. intracerebral or subarachnoid hemorrhage)
10. Traumatic brain hemorrhage within 1 month of randomization
11. Contraindication for MRI scan (e.g. pacemaker incompatible with MRI)
12. Advanced kidney disease (recent estimated GFR <30 ml per minute)
13. Modified Rankin Scale (mRS) >=4 at entry
14. Platelet count less than 100,000/mm3 at enrolment or other bleeding diathesis
15. Uncontrollable hypertension with systolic BP/ diastolic BP consistently above180/100mmHg after treatment
16. Known hypersensitivity to either ASA or rivaroxaban
17. Life expectancy less than 6 months
18. Concomitant use of strong inhibitors of both cytochrome P450 isoenzyme 3A4 (CYP3A4) and P-glycoprotein (P-gp), i.e., human immunodeficiency virus protease inhibitors and the following azole-antimycotics agents: ketoconazole, itraconazole, voriconazole, or posaconazole, if used systemically
19. Female of childbearing potential who are not surgically sterile, or, if sexually active not willing to use adequate contraceptive measures with a failure rate less than 1% per year (e.g., prescription oral contraceptives, contraceptive injections, intrauterine device, double-barrier method, male partner sterilization) before entry and throughout the study, as well as pregnant or breast-feeding women
20. Inability to adhere to study procedures
21. Close affiliation with the investigational site; e.g. a close relative of the investigator, dependent person (e.g., employee or student of the investigational site)
22. Previous randomization to this study or participating in a study with an investigational drug or medical device at the time of randomization
23. Antiphospholipid antibody syndrome

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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101 participants in 2 patient groups

Experimental (riva + ASA)

Experimental group

Description:

Rivaroxaban 2.5mg bid + aspirin 81mg qd

Treatment:

Drug: Acetylsalicyclic acid 81 mg tablet qd

Drug: Rivaroxaban 2.5 Mg Oral Tablet bid

Control (ASA alone)

Active Comparator group

Description:

Aspirin 81 mg qd

Treatment:

Drug: Acetylsalicyclic acid 81 mg tablet qd