Combination Antithrombotic Treatment for Prevention of Recurrent Ischemic Stroke in IntraCranial Atherosclerotic diseaSe (CATIS- ICAS)
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: Rivaroxaban, ASA.
- Who it may be relevant to
- Registry conditions: Ischemic Stroke, Intracranial Atherosclerosis. Basic parameters: from 40 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- Center list to be confirmed — check the primary protocol.
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
Unsure about the terms? Read our patient guide →
Overview
CATIS-ICAS is a double-blind, randomized, placebo-controlled (RCT), phase III study seeking to demonstrate that oral rivaroxaban 2.5 mg twice daily plus aspirin daily is superior to clopidogrel 75 mg daily plus aspirin daily for 90 days followed by placebo plus aspirin daily for preventing recurrent stroke in those with ischemic stroke secondary to intracranial atherosclerotic disease (ICAD) of 30-99%, when started within 30 days of index stroke.
Detailed description
CATIS-ICAD will recruit approximately 1172 consenting participants presenting with ischemic stroke secondary to ICAD within 30 days from symptom onset at approximately 80 high-volume stroke research centers across Canada, Europe, South America and Asia over 48 months. Participants will be randomly assigned (1:1) to oral intake of rivaroxaban 2.5 mg twice daily plus aspirin or clopidogrel 75 mg daily plus aspirin followed by aspirin plus placebo. They will be followed to a common termination date, defined as approximately 12 months following the end of recruitment (estimated mean follow-up of 36 months).
Interventions
- Drug Rivaroxaban
Low-dose rivaroxaban (2.5 mg BID) plus clinical ASA - Drug ASA
clopidogrel loading dose (if applicable), then dual antiplatelet therapy (placebo plus clopidogrel plus clinical ASA) for first 90 days, followed by placebo plus clinical ASA for remainder of treatment period.
Primary outcome measures
- Time to first symptomatic stroke for participants [Time frame: From randomization until end of study visit (12 months after Last Patient First Visit)]
Eligibility criteria
Inclusion criteria
- Age > 40 years
- Ischemic stroke or high-risk TIA (motor and/ or speech involvement)
- Randomization within 30 days of index stroke
- Stroke potentially attributable to ICAS 30-99% (or flow gap on time-offlight MRA) of a major intracranial artery (internal carotid artery, middle cerebral artery, anterior cerebral artery, posterior cerebral artery, intracranial vertebral artery, or basilar artery) by MRA or CTA or catheter angiography.
- Modified Rankin Scale Score < 4 at randomization
- Ability to obtain informed consent prior to randomization.
Exclusion criteria
- Cardioembolic stroke
- Indication for long-term dual antiplatelet or anticoagulant therapy (e.g. venous thromboembolism, coronary stent, mechanical prosthetic valve)
- Intracranial arterial stenosis secondary to causes other than atherosclerosis e.g. dissection, moya moya disease
- Substantial extracranial carotid artery disease ipsilateral to the qualifying stroke with plans for carotid revascularization
- Intended intracranial stenting for the qualifying stroke
- Symptomatic hemorrhagic transformation of the index stroke, or neuroradiological class 2 (PH2 type) or symptomatic class 3 on Heidelberg scale prior to randomization
- Previous non-traumatic intracerebral hemorrhage, non-aneurysmal subarachnoid hemorrhage (treated aneurysmal subarachnoid hemorrhage will be allowed)
- Subdural hematoma within 12 months prior to randomization or traumatic brain hemorrhage within 1 month prior to randomization
- Advanced kidney disease at randomization (eGFR <15 ml per minute)
- Platelet count less than 100,000/mm3 at enrolment or other bleeding diatheses
- Uncontrolled hypertension with BP consistently above 180 mmHg for systolic and 110mmHg for diastolic while on treatment
- Known hypersensitivity or contraindication to ASA, clopidogrel or rivaroxaban
- Concomitant use of strong inhibitors of both cytochrome P450 isoenzyme 3A4 (CYP3A4) or P- glycoprotein (P-gp)
- Females of childbearing potential who are not surgically sterile, pregnant, or breast-feeding
- Previous randomization to this study
- Participating in a study with an investigational drug or medical device that would interfere with the study at the time of randomization (participants that are no longer in an active arm of a study but are being followed may be randomized)
- Terminal medical illness with life expectancy less than 1 year
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: No
Study design
- Allocation
- Randomized
- Model
- Parallel assignment
- Masking
- Quadruple blind
- Primary purpose
- Prevention
Study locations
Center list to be confirmed — check the primary protocol.
Identifiers
NCT: NCT07468448 · CATIS-ICAS