D-dimer Assay for the Exclusion of Intra-atrial Thrombus Risk Before Ablation of Atrial Fibrillation

Etude du Dosage Des d-dimères sériques Pour le Diagnostic d'Exclusion Des Thrombi Intra-atriaux Avant Ablation Endocavitaire de Fibrillation Atriale

The purpose of this study is to determine whether D-dimer dosage allow to exclude risk of intraatrial thrombus before performing an ablation of atrial fibrillation

Inclusion Criteria:

• Age> 18 years.
• Patients hospitalized for ablation of atrial fibrillation or symptomatic left flutter
• Patient informed of the study

Exclusion Criteria:

• Age <18 years.
• Patients under guardianship
• Pregnant woman
• Contraindication to transesophageal echocardiography
• transesophageal echocardiography made in another center as the center of ablation
• Refusal of the patient to participate in the study
• Patient participating in another interventional study in which an intervention related to biomedical research is performed before the transesophageal echocardiography