Delacroix S, et al. – This study was performed to gauge the effects of renal sympathetic denervation (RSDN) on renal artery blood flow and diameter at multiple time points post-RSDN. As evidenced by significant improvements in a total volume of blood flow per cardiac cycle, RSDN improved renal physiology. Immediately after procedure potentially caused by edema and inflammation that reverted to baseline values 6 months post-procedure, a transient decrease in renal artery diameters, was determined for the first time.