The invention relates to a system (1) for stimulating renal nerves of a renal artery of a subject (3). The system comprises a stimulation device (12, 17, 28) for stimulating the renal nerves, a measuring unit (20) for measuring the blood pressure and/or the heart rate of the subject at at least two times, wherein at least one of these times is during or after the stimulation of the renal nerves, and a subject suitability determination unit (14) for determining whether the subject is suitable for a renal sympathetic denervation procedure based on the measured blood pressure and/or the measured heart rate. The invention allows therefore for a preselection of subjects which are suitable for a renal sympathetic denervation procedure.