Renal artery duplex ultrasound has been very successful in assessing renovascular hypertension. When renal artery velocities are within normal limits, but the Doppler spectral waveform is of small amplitude with a prolonged systolic rise, a more proximal arterial stenosis is suspected. We describe 2 cases of coarctation of the aorta in adults that were diagnosed with the assistance of aortic and renal artery duplex ultrasound.
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