Best Duplex-Sonographic Criteria for the Assessment of Renal Artery Stenosis - Correlation with Intra- Arterial Pressure Gradient

Abstract

DS measurements and the severity of arteriographic diameter reduction correlate well with systolic pressure gradients. Clinically expedient DS criteria for detecting RAS of > or = 50 % are a PSV of > or = 200 cm/sec or a RAR of > or =2.5. These criteria allow reliable exclusion of severe RAS of > or = 70 %.