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Radiology General e9e7b47c

The most impoant sign of significance of renal aery stenosis on an angiogram is:

A
A percentage diameter stenosis >70%
B
Presence of collaterals
C
A systolic pressure gradient >20 mmHg across the lesion
D
Post stenotic dilatation of the renal aery
High-Yield Explanation
B i.e. Presence of collaterals

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