Clopidogrel For the Prevention of New Onset Migraine Headache Following Transcatheter Closure of Atrial Septal Defects (CANOA)
![]() |
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. |
ClinicalTrials.gov Identifier: NCT00799045 |
Recruitment Status :
Completed
First Posted : November 27, 2008
Last Update Posted : February 26, 2019
|
- Study Details
- Tabular View
- No Results Posted
- Disclaimer
- How to Read a Study Record
Condition or disease | Intervention/treatment | Phase |
---|---|---|
Migraine | Drug: Clopidogrel | Phase 4 |
The objective is to evaluate the incidence and severity of new-onset migraine headache episodes following transcatheter ASD closure in patients treated with aspirin alone compared to those on aspirin + clopidogrel therapy as antithrombotic treatment after the procedure.
This is a prospective, randomized, double blind, multicenter study, including patients with no previous history of migraine attacks who have been diagnosed with an ASD and for whom transcatheter ASD closure has been clinically indicated. Patients will be randomized either to aspirin (80 mg/day) or aspirin (80 mg/day) + clopidogrel (75 mg/day) for 3 months following ASD closure. The occurrence and severity of migraine headaches will be evaluated by a neurologist using a structured headache questionnaire at 1 month and 3 months following ASD closure. An additional 6 month and 1 year follow-up evaluation will be exploratory according to local feasibility.
Study Type : | Interventional (Clinical Trial) |
Actual Enrollment : | 220 participants |
Allocation: | Randomized |
Intervention Model: | Parallel Assignment |
Masking: | Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor) |
Primary Purpose: | Prevention |
Official Title: | Clopidogrel On Top of Aspirin For the Prevention of New Onset Migraine Headache Occurrence Following Transcatheter Closure of Atrial Septal Defects: A Prospective Randomized Trial (the CANOA Study) |
Study Start Date : | October 2008 |
Actual Primary Completion Date : | April 2015 |
Actual Study Completion Date : | December 2016 |

Arm | Intervention/treatment |
---|---|
Experimental: Aspirin + clopidogrel
Aspirin (80 mg/day) + clopidogrel (75 mg/day) for 3 months following ASD closure.
|
Drug: Clopidogrel
Patients will be randomized either to aspirin (80 mg/day) or aspirin (80 mg/day) + clopidogrel (75 mg/day) for 3 months following ASD closure.
Other Name: Clopidogrel (Plavix) |
Active Comparator: Aspirin
Aspirin (80 mg/day) for 3 months following ASD closure.
|
Drug: Clopidogrel
Patients will be randomized either to aspirin (80 mg/day) or aspirin (80 mg/day) + clopidogrel (75 mg/day) for 3 months following ASD closure.
Other Name: Clopidogrel (Plavix) |
- Mean number of monthly migraine days per patient within the 3 months following transcatheter ASD closure. [ Time Frame: 3 months ]
- Severity of migraine attacks following ASD closure as evaluated by the intensity of migraine episodes and the Migraine Disability Assessment (MIDAS) questionnaire at 3-month follow-up after ASD closure. [ Time Frame: 3 months ]
- Incidence of bleeding complications at 3-month follow-up. [ Time Frame: 3 months ]
- Percentage of patients with new-onset migraine attacks. [ Time Frame: 3 months ]
- Time to first migraine episode. [ Time Frame: 3 months ]
- Percentage of patients with migraine headaches at 6-month and 1-year follow-up (exploratory only according to local feasibility). [ Time Frame: 1 year ]

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
Ages Eligible for Study: | 18 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
- Patients ≥ 18 year old undergoing transcatheter ASD closure with the Amplatzer Septal Occluder device (AGA medical Corp., MN, USA).
- Female subjects must be post-menopausal, surgically sterile, or using an effective method of birth control.
- Signed an informed consent document.
Exclusion Criteria:
- Allergy or intolerance to any of the antithrombotic drugs (aspirin, clopidogrel) used in the study.
- Need for anticoagulation therapy.
- Use of ASD closure devices other than the Amplatzer Septal Occluder device.
- History of migraine headaches (based on migraine headache questionnaire).
- Refusal to sign the informed consent.
- Pregnancy or breast-feeding or planning to become pregnant during the study.
- Previous stroke.

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00799045
Canada | |
Hopital Laval | |
Quebec, Canada, G1V 4G5 |
Principal Investigator: | Josep Rodes-Cabau, MD | Hopital Laval |
Responsible Party: | Laval University |
ClinicalTrials.gov Identifier: | NCT00799045 |
Other Study ID Numbers: |
CLOPI_L_03563 |
First Posted: | November 27, 2008 Key Record Dates |
Last Update Posted: | February 26, 2019 |
Last Verified: | February 2019 |
Migraine atrial septal defects transcatheter clopidogrel |
Migraine Disorders Heart Septal Defects Heart Septal Defects, Atrial Headache Headache Disorders, Primary Headache Disorders Brain Diseases Central Nervous System Diseases Nervous System Diseases Pain Neurologic Manifestations Heart Defects, Congenital Cardiovascular Abnormalities |
Cardiovascular Diseases Heart Diseases Congenital Abnormalities Clopidogrel Platelet Aggregation Inhibitors Purinergic P2Y Receptor Antagonists Purinergic P2 Receptor Antagonists Purinergic Antagonists Purinergic Agents Neurotransmitter Agents Molecular Mechanisms of Pharmacological Action Physiological Effects of Drugs |