Panel C shows the typical appearance of atherosclerotic renal-artery stenosis, involving the ostium and proximal third of the left renal artery (arrows). After angioplasty, there was residual ...

Panel B shows the estimated velocity of blood flow in excess of 900 cm per second in the left renal artery near the aortic ostium; 90% stenosis was confirmed angiographically. The angiographically ...