This study aims to assess the incidence of atrial fibrillation (AF), documented using data recorded by an implantable Holter monitoring device (Reveal Linq, Medtronic) within 2 years after percutaneous closure of patent foramen ovale for cryptogenic stroke.

This study aims to assess the incidence of atrial fibrillation (AF), documented using data recorded by an implantable Holter monitoring device (Reveal Linq, Medtronic) within 2 years after percutaneous closure of patent foramen ovale (PFO) for cryptogenic stroke. Secondary objectives include assessment of the burden of AF at 2, 12 and 24 months after PFO closure; evaluation of the relationship between plasma levels of MR proANP and presence of AF within 2 years after percutaneous PFO closure in patients with a history of cryptogenic ischemic stroke; and description of recurrence rates for stroke (ischemic and hemorrhagic), major bleeding, minor bleeding, peripheral emboli during the 2-year follow-up period after percutaneous PFO closure, in patients with and without AF.

Inclusion Criteria:

• Adult patients (aged >18 years)
• with an indication for percutaneous closure of PFO due to cryptogenic stroke, with indication validated by a cardio-neurological team.
• patients must provide written informed consent
• patients must be affiliated to a social security regime or be a beneficiary thereof.

Exclusion Criteria:

• Patients under legal protection
• Patients not affiliated to any social security regime
• Patients within the exclusion period of another clinical trial as per the national registry of research volunteers

Prospective patients who have had cryptogenic stroke (ischemic only) and with patent foramen ovale confirmed by transoesophageal echocardiography, with an indication for percutaneous closure.