Inclusion Criteria:  Adults patients Day hospitalization for a check-up in the context of arterial hypertension with suspicion of secondary origin including a dosage of renin and plasma aldosterone Non-opposition to the study  Exclusion Criteria:  Cardiac arrythmia Patient under AME (state medical assistance)  Treatments interfering with uninterrupted hormonal dosages before day hospitalization  Absence of B-blockers, converting enzyme inhibitor and sartans in the 15 days preceding the dosages Absence of antialdosterone, and amiloride in the 6 weeks preceding the dosages Absence of loop diuretics or diuretics in the 7 days preceding the dosages