1. Follow-up of renal artery stenosis by duplex ultrasound
David C. Taylor, MD, Gregory L. Moneta, MD, D.Eugene Strandness, MD 
Journal of Vascular Surgery 
Volume 9, Issue 3, Pages (March 1989)
DOI: /S (89)
Copyright © 1989 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

2. Fig. 1
Doppler velocity waveforms obtained from patient with stenosis of proximal right renal artery. There is marked localized velocity increase with turbulence recorded from area of stenosis when compared with the adjacent aorta (RAR = 6).
Journal of Vascular Surgery 1989 9, DOI: ( /S (89) )
Copyright © 1989 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

3. Fig. 2
This shows Doppler velocity waveforms obtained in patient with stenosis of left renal artery both before (A) and after (B) percutaneous transluminal angioplasty. Localized velocity increase associated with the stenosis is resolved with return of a normal Doppler velocity waveform of the renal artery after angioplasty indicating relief of the stenosis.
Journal of Vascular Surgery 1989 9, DOI: ( /S (89) )
Copyright © 1989 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

4. Fig. 3
Velocity waveforms obtained postoperatively after bilateral aortorenal bypass. In this patient a normal waveform was shown from the right aortorenal graft but no flow was shown by duplex scanning in the left renal artery, indicative of graft occlusion. Graft occlusion in this case was not clinically suspected.
Journal of Vascular Surgery 1989 9, DOI: ( /S (89) )
Copyright © 1989 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions