• Patients aged 60 to 80 years

• Persistent atrial fibrillation

• Patients with an indication for cardiac rhythm control.

• Montreal Cognitive Assessment score between 18 and 25 points corresponding to mild cognitive impairment

• Free subject, not under temporary or permanent guardianship and not subject to subordination

• Subject understanding and accepting the constraints of the study

• Patient covered by French national health insurance or benefiting from it through a third party

• Subject has given written consent to the study after having received clear and complete information