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Nephrol Dial Transplant (2000) 15: 539-543
© 2000 European Renal Association-European Dialysis and Transplant Association

Teaching Points

Parvus tardus waveform suggesting renal artery stenosis—remember the more proximal stenosis

Donald Richardson1, Judith Foster2, Alex M. Davison1 and Henry C. Irving2

1 Department of Renal Medicine and 2 Department of Clinical Radiology, St James's University Hospital, Leeds, UK

Correspondence and offprint requests to: D. Richardson, Department of Renal Medicine, St James's University Hospital, Beckett Street, Leeds LS9 7TF, UK.

Keywords: Doppler ultrasound; reno-vascular disease; aortic coarctation; aortic stenosis; renal failure

Introduction

Colour Doppler ultrasound with spectral analysis of waveforms from intra-renal vessels may provide diagnostic information regarding vascular disease in both native and transplant kidneys. The normal spectral waveform from an intra-renal artery has a sharp systolic rise, a gradual reduction in velocity of flow in later systole, and low velocity forward flow throughout diastole (Figure 1Go).



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  		Fig. 1. Normal intra-renal arterial waveform, showing a sharp systolic upstroke peak and forward flow throughout the cardiac cycle.

 
In the investigation of intra-renal vessels the `Parvus tardus waveform' has been described, where the presence of a small amplitude waveform with a prolonged systolic rise (slow upstroke) is considered to . . . [Full Text of this Article]

Case reports

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Conclusion

Teaching points

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