In stenosis of a segmental branch or among multiple renal arteries, Doppler
sampling of intrarenal arteries in the upper, mid and lower poles demonstr
ates strikingly different waveform patterns that might otherwise be overloo
ked. We report a case of segmental branch renal artery stenosis in which a
pulsus parvus et tardus waveform was observed in a segmental branch of a re
nal artery. In this case, systematic analysis of Doppler waveforms of intra
renal arteries at more than three different locations facilitated a rapid a
nd confident diagnosis of segmental branch renal artery stenosis.