Inclusion Criteria:  Patient ⩾ 18 years; Patient undergoing chronic dialysis in hemodialysis facility of Ambroise Paré hospital; Patient has been informed and given no-opposition for participating to the study.  Exclusion Criteria:  Patient with a pacemaker or an implantable cardioverter defibrillator; Patient under guardianship or curatorship; Foreign patient under french AME scheme.