Renal Artery Duplex Ultrasonography as a Screening and Surveillance Tool to Detect Renal Artery Stenosis

Abstract

Renal artery duplex ultrasonographic parameters for 60% or greater RAS correlate well with QVA. For detecting stenosis of 60% or greater, RAR is the most accurate parameter at a threshold of 2.5. Renal-aortic ratio is more accurate than PSV. Peak systolic velocity may be a useful RADUS alternative parameter for hemodynamically important stenoses in the setting of aortic disease when aortic velocities are less than 40 or greater than 100 cm/s.