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Markedly elevated velocities, a renal-aorta-ratio up to 5 and apparent luminal narrowing and aliasing from the origin to mid-point of the right renal artery. Greater than 0.5 difference in the resistive indices of the intrarenal waveforms between both kidneys. These findings suggest a >70% stenosis in the right renal artery despite tardus-parvus waveforms not being seen.