What are the SCAI guidelines for use of renal angiography in 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

SCAI recommends renal angiography as the gold standard for invasive assessment of hemodynamically significant RAS and categorizes stenosis severity as follows [58] :

  • Mild: <50%
  • Moderate: 50–70%
  • Severe: >70%

Severe angiographic stenosis is considered hemodynamically significant. Moderate angiographic stenosis is considered hemodynamically significant only when the patient also has a resting mean pressure gradient >10 mm Hg or systolic hyperemic pressure gradient >20 mm Hg or renal fractional flow reserve (FFR) ≤0.8. Mild and moderate stenosis that is not hemodynamically significant should only rarely be considered for revascularization. [58]


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