How are diagnostic tests selected for renal artery stenosis (RAS)?

Updated: Nov 02, 2020
  • Author: Bruce S Spinowitz, MD, FACP; Chief Editor: Vecihi Batuman, MD, FASN  more...
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Answer

Once patients are identified as being at high risk for renal artery stenosis, the choice of the best test for diagnosis is controversial.

Accurate identification of patients with correctable renovascular hypertension can be difficult with use of standard noninvasive techniques (eg, sonography) because they provide only indirect evidence of the presence of renal artery lesions.

On the other hand, invasive techniques with more accurate diagnostic potential can produce a worsening of renal function because of contrast toxicity and complications related to the procedures themselves (eg, arterial puncture, catheter-induced atheroembolism).


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