What is the role of IV subtraction angiography in the workup of 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

Intravenous subtraction angiography is sensitive for identifying stenosis of the main renal artery but does not demonstrate accessory or branch renal arteries sufficiently. Solitary stenosis of a branch of the renal artery is a common source of renovascular hypertension in pediatric patients, among the fraction in whom the disorder does not result from syndromes such as neurofibromatosis. [24] However, intravenous subtraction angiography avoids the use of a high volume of contrast and the risk of artery puncture and arterial atherosclerotic emboli.


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