SummaryEach hypertensive patient should have a thorough kidney investigation. A possible stenosis of the renal artery has to be considered, where the renal tissue seems normal.The purpose of this paper was to review the several methods of investigation, each with their utility : the suggestive signs of Poutasse, the total kidney functions, the TEAC test, the isotopic nephrogram, the comparison of the renal function and finally the aortorenography.The contraindications of these investigations are summarized. A few typical personal observations of renovascular pathology are described. In their conclusion, the authors suggest to reserve an aortorenography only for these cases, where the other screening tests indicate the probability of an arterial lesion.