NCT07629635 · Columbia University
Migraine Headaches Elimination With Patent Foramen Ovale-Directed Therapy
(COMFORT-PFO)
What this study is about
Migraine is a common and often disabling condition, but its exact causes are not fully understood. Some people with migraines have a small opening in the heart wall called a patent foramen ovale (PFO). In some of these patients, closing this opening or taking a medication that inhibits blood platelets (prasugrel) has been shown to reduce migraines.
View original scientific description
Migraine is a common and often disabling condition, but its exact causes are not fully understood. Some people with migraines have a small opening in the heart wall called a patent foramen ovale (PFO). In some of these patients, closing this opening or taking a medication that inhibits blood platelets (prasugrel) has been shown to reduce migraines. However, not everyone benefits, and it is unclear why. This study is being done to better understand whether closing a PFO can provide lasting migraine relief - especially in patients whose migraines improve with prasugrel. The goal of this study is to find out whether, in patients whose migraines improve while taking prasugrel, closing the PFO along with 24 weeks of prasugrel leads to better long-term migraine relief after stopping the medication, than by taking prasugrel for 24 weeks alone. Participants will track their migraines daily using an electronic diary, then take prasugrel and compare their migraines while on the medication. Only patients whose migraines improve on this medication will continue in the study. Eligible participants will be randomly assigned (like flipping a coin) to one of two groups: 1) Medication-only group: Continue prasugrel for 24 weeks. 2) Procedure group: Undergo a minimally invasive procedure to close the PFO and continue prasugrel for 24 weeks. After treatment, the medication will be stopped in both groups, and participants will again track their migraines for about 8 weeks.
Interventions
DRUG
Prasugrel 5mg
Six months of daily prasugrel therapy following randomization.
DEVICE
Transcatheter Closure of Patent Foramen Ovale
A standard transcatheter closure of PFO will be performed in the Group B cohort. During this non-surgical procedure, the GORE Cardioform Septal Occluder will be used to close the PFO (it is FDA-approved for exactly this purpose for prevention of recurrent stroke) but will be used here in an off-label fashion.
Primary outcome measures
Reduction in Monthly Migraine Days (MMD)
Time frame: upon completion of the 56-day Post-Therapy monitoring session
The primary efficacy endpoint is the proportion of randomized subjects maintaining a clinically meaningful migraine response, defined as a ≥50% reduction in Monthly Migraine Days (MMD) in the Post-Therapy monitoring session, compared with the Baseline monitoring session (following discontinuation of prasugrel).
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Age: ≥18 and \<55 at time of screening
- Migraine headache with aura, or migraine headache without aura, fulfilling conditions of the Neurology Screening Tool (meeting ICHD-3 criteria)
- Diagnosis of migraine for ≥ 1 year; onset of migraine symptoms \< 40 years of age
- By history, an average headache burden of greater than one migraine headache day per week:
- without current preventative therapy, OR
- despite preventative therapy, OR
- with reason to come off effective therapy (e.g. cost, aversion to injections, side effects)
- If patient is taking preventive migraine medications, dose must be stable for at least 3 months prior to the screening visit. Patient agrees to continue preventive medication at the current dosage throughout the duration of the Baseline and On-treatment monitoring periods (Study Weeks 1 - 17).
- Female patients capable of becoming pregnant agree to use two forms of birth control or abstinence during their participation in the study. Patient
Exclusion criteria
- Headache disorder other than migraine with aura, or migraine without aura
- Patient has history of stroke, TIA, or intracranial hemorrhage.
- Patient has a history of thrombocytopenia within one year, or platelet count \<100,000/mm3 identified during the screening laboratory evaluation.
- Patient has severe hepatic impairment with reduced synthetic function as documented by prolongation of PT/PTT, or with total bilirubin \>3.0 mg/dL identified during the screening laboratory evaluation.
- Patient has previously implanted pacemaker, IVC filter, PFO closure device, ASD closure device, or left atrial appendage closure device or any cardiac history which, in the investigator's opinion, would preclude them from study participation.
- Patient has documented right-to-left shunt source in addition to PFO such as atrial septal defect or pulmonary arteriovenous malformation.
- Patient has a history of clinically significant bleeding within 6 months of the screening visit, any active bleeding, or active peptic ulcer disease.
- Patient has an uncontrolled arrhythmia, or if on therapy, has evidence of arrhythmia control failure within the past 90 days (e.g., supraventricular tachycardia or atrial fibrillation while under rhythm control).
- Patient has elevated PVR which in the opinion of the implanting physician precludes safe PFO closure.
- Patient has active infection at the time of screening that cannot be treated.
- Patient is planning surgery during the study timeframe.
- A female patient is pregnant or is planning pregnancy during the anticipated duration of the study. Urine or blood pregnancy screening will be performed as part of the screening laboratory evaluation.
- Patient has documented nickel allergy/sensitivity
- Patient has a documented history of non-compliance with medical care, which would preclude them, in the opinion of the study team Exclusion Due to Medication Restrictions:
- Patient has known hypersensitivity or contraindication to thienopyridines
- Patient has another medical condition requiring chronic antithrombotic therapy with antiplatelet, oral anticoagulant or injectable agents
- Patient has need for daily use of NSAIDs other than for treatment of migraines
Where
- New York, New York
Collaborators
Occlutech International AB, W.L.Gore & Associates
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Oct 8, 2026 · Source of record for eligibility and locations