Impact of Percutaneous Closure of the Left Atrial on the Maximum Proto-diastolic Speed of the Mitral Ring Measured by Tissue Doppler (ACTIFER)

Inclusion Criteria: * Man or woman over 18 years-old * Patient with paroxysmal AF at high embolic risk (CHA2DS2Vasc score ≥ 4) and presenting a formal and definitive contraindication to anticoagulants * Patient scheduled for percutaneous closure of the left auricle by St Jude AMULET device * Patient in sinus rhythm * Subject affiliated or beneficiary of a social security scheme * Patient having signed the informed consent Exclusion Criteria: * Patient participating in another clinical study * Patient in permanent ACFA * Patient with a mitral prosthesis (biological or mechanical), * Patient with a history of mitral annuloplasty * Protected patient: adult under guardianship, curatorship or other legal protection, deprived of liberty by judicial or administrative decision; * Pregnant, breastfeeding or parturient woman; * Patient hospitalized without consent.