Aspirin-free ticagrelor treatment for heart attack patients managed without revascularization
Official title: Evaluation of an asPirin-free Strategy With ticAgrelor in patieNTs witH a Myocardial Infarction treatEd Medically alONe (PANTHEON)
Run by Montreal Heart Institute · NCT07257198 · Data updated 2026-11-12
This trial will test whether taking ticagrelor alone (no aspirin) lowers bleeding without increasing heart problems in adults who had a heart attack and were treated medically without revascularization.
Quick facts
| Phase | Phase 3 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 2570 (estimated) |
| Sponsor | Montreal Heart Institute Academic / other |
| Locations | 1 site (Montreal, Quebec) |
| Status | Recruiting |
| Started | March 3, 2026 |
| Main results expected | January 1, 2030 |
| Study ends | January 1, 2031 |
| Registry record updated | March 10, 2026 |
| Trial ID | NCT07257198 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adults (≥18) hospitalized for a type 1 MI who had a coronary angiogram and are planned for medical management only (no revascularization), able to attend study visits, and expected to live at least 12 months.
✕Probably not a fit
Patients who underwent or require revascularization, have type 2–5 MI or non-ischemic myocardial injury, need chronic oral anticoagulants, or have another clear indication for dual antiplatelet therapy are unlikely to benefit from this strategy.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This is a phase 3, randomized, placebo-controlled trial comparing ticagrelor monotherapy to standard dual antiplatelet therapy (ticagrelor plus aspirin) for 12 months in patients discharged after a type 1 myocardial infarction managed without revascularization. The trial's co-primary goals are to test whether ticagrelor alone reduces BARC type 2, 3, or 5 bleeding at 12 months and to show non-inferiority for a patient-centered ischemic composite (death, MI, stroke, or coronary revascularization) at 12 months. Secondary endpoints include other bleeding classifications (BARC 3/5, TIMI) and individual ischemic outcomes such as cardiovascular death and any revascularization. Participants receive either ticagrelor plus placebo or ticagrelor plus aspirin and are followed with scheduled study visits through the 12-month period.
Why it matters
Potential benefit: If successful, this approach could let some heart attack patients avoid aspirin and experience fewer bleeding complications while keeping similar protection against heart attacks and strokes.
How similar studies have gone: Similar aspirin-withdrawal strategies after PCI (for example TWILIGHT and TICO) have reduced bleeding with preserved ischemic protection, but applying ticagrelor monotherapy specifically to medically managed MI patients is less studied and more novel.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion criteria: * Age ≥18 years; * Hospitalized for type 1 MI, according to the 4th Universal Definition of MI; * Coronary angiogram performed; * Planned for medical management alone, without revascularization; * Willingness to participate and to attend study visits; * Expected life expectancy ≥12 months. Exclusion criteria: * Patients hospitalized for type 2-5 MI, or unstable angina, according to the 4th Universal Definition of MI; * Patients hospitalized for a STEMI with an acute thrombotic lesion of a major epicardial vessel; * Elevations in cardiac biomarkers (troponins or CK-MB) that is believed by the investigator not to be of ischemic origin (e.g. myocardial injury, myocarditis, Takotsubo syndrome, etc.); * Confirmed or suspected spontaneous coronary artery dissection; * Concomitant indication for chronic oral anticoagulant; * Concomitant non-coronary indication for dual antiplatelet therapy; * Use of any non-trial antiplatelet drug that needs to be continued based on the judgement of the treating physician; * Previous hospitalization for MI, PCI, or CABG within 12 months; * Known hypersensitivity, intolerance, or contra-indication to ASA or ticagrelor; * Unsuitability for either randomization treatment, based on the judgement of the treating physician
Where it's running
-
Montreal Heart Institute
Montreal, Quebec, Canada Recruiting
Study contacts
- Study coordinator: Guillaume Marquis-Gravel, MD
- Email: guillaume.marquis.gravel@umontreal.ca
- Phone: 1-514-376-3330
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
-
Preventing reperfusion injury during ST-elevation heart attack using Xolatryp
This will test whether a single 6-hour IV infusion of Xolatryp given during primary PCI helps people having their first ST-elevation heart attack reduce heart muscle damage and improve short-term heart function.
-
Optimal antithrombotic strategy for patients with atrial fibrillation undergoing PCI
This study is testing whether a new blood-thinning treatment for patients with atrial fibrillation undergoing heart procedures is safer and just as effective as the traditional approach that includes more medications.
-
Heart@Home: Safe, at-home care for people with acute heart problems compared with hospital care
This trial tests whether hospital-level care at home can safely and effectively treat adults with acute heart conditions who would normally be in the hospital.
-
Digital cardiac rehab to help heart attack patients improve function
A digital health–supported cardiac rehabilitation program is being tested to see if it helps people after a heart attack improve fitness and stay engaged with rehab, compared with standard outpatient rehab.
-
NMR-based Risk Test and Digital Health Support for midlife adults in Eloisa
This study tests whether an NMR metabolomics risk test can guide tailored digital health programs for midlife adults at risk of diabetes, heart disease, stroke, kidney disease, or fatty liver.
-
See if stopping long-term aspirin is as good as continuing it in older adults with stable ischemic heart disease
In adults 65 and older with stable ischemic heart disease, this trial tests whether stopping daily low-dose aspirin is not worse than continuing it.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.