A prospective comparison of duplex ultrasonography, captopril renography, MRA, and CTA in assessing renal artery stenosis

Abstract

MRA and CTA were significantly better than duplex ultrasonography and captopril renography in detecting hemodynamically significant RAS. The ultrasonography criteria for RAS based on the evaluation of renal peak systolic velocity and renal/aortic ratio are questionable. Captopril renography cannot be recommended for assessing RAS.