Figure 2. Tardus–parvus waveform in a patient with nephropathy and renal artery stenosis. Note the delayed and dampened upstroke yielding a rounded appearance to the waveform. RI = 0.9

From

Serum Relaxin and Renal Vascular Resistance in Diabetic and Non-Diabetic Patients with Different Grades of Chronic Kidney Disease

Ehab Abdelatti, Tarek E. Korah, Alaa Dawood, Ahmed Ragheb, Waleed M. Fathy, Waleed Mousa, Ashraf Anas Zytoon

American Journal of Medical Sciences and Medicine. 2013, 1(6), 114-119 doi:10.12691/ajmsm-1-6-4