Concordance Between the Foot-to-Apex Systolic Interval and the Auscultatory Method for Measurement of Brachial Systolic Pressure in Patients With Severe Renal Failure

Inclusion Criteria: * The patient must have given their free and informed consent and signed the consent form * The patient must be a member or beneficiary of a health insurance plan * Patient under consultation in the Nephrology for severe renal impairment (defined by a glomerular filtration rate \<30 mL / min, assessment within previous 3 months) Exclusion Criteria: * The subject is participating in an interventional study, or is in a period of exclusion determined by a previous study * The subject refuses to sign the consent * It is impossible to give the subject informed information * The patient is under safeguard of justice or state guardianship * Patient is pregnant or breastfeeding