Radiology, Vol 160, 713-715, Copyright © 1986 by Radiological Society of North America
Renal artery stenosis: evaluation with intravenous digital subtraction angiography
GE Wilms, AL Baert, JA Staessen and AK Amery
The ability of diagnostic intravenous digital subtraction angiography
(IVDSA) to demonstrate the degree of renal artery stenosis was compared
with that of intraarterial angiography in 45 patients with 92 arteries.
Stenotic lesions on both IVDSA and intraarterial studies were classified as
normal (0% stenosis), minor (less than 50%), low grade (50%-80%), and high
grade (80%-99%). There was agreement about the degree of stenosis in 90% of
the cases. IVDSA grading was correct in 94% of atheromatous lesions and in
56% of the fibromuscular dysplastic lesions. In the high-grade atheromatous
lesions, the degree of stenosis was slightly overestimated on IVDSA studies
in 22.5% of the cases. In fibromuscular dysplasia, stenosis was
underestimated in 33% of the cases.
