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Renal Artery Stenosis (cont.)

What are the exams and tests for renal artery stenosis?

Blood tests

Screening blood tests may be done as part of the general evaluation of high blood pressure and may include a complete blood count, electrolytes, kidney function tests, and a urinalysis.


Renal artery narrowing can be detected with ultrasound or computerized tomography angiography or arteriography.

Ultrasound uses sound waves to visualize anatomic structures, and with special techniques, can approximate the amount of blood flowing through the renal artery to the kidney.

Computerized tomography (CT) will show all the blood vessels in the abdomen as well as the other organs. The intravenous dye used may have the potential to cause some kidney damage.

Arteriography is the most invasive, since a catheter or small tube needs to be threaded through the arteries in the groin into the renal arteries and dye injected. This test will give the best opportunity to decide how much narrowing there is and if it is found, angioplasty and stenting may be done as part of the treatment. (see Treatment, below)

The benefit and risk of each procedure needs to be assessed for each patient to decide what would be most appropriate in a given situation.

Medically Reviewed by a Doctor on 6/22/2016

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Renal Artery Stenosis - Treatment

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Read What Your Physician is Reading on Medscape

Renal Artery Stenosis »

Specialists have known for a long time that renal artery stenosis (RAS) is the major cause of renovascular hypertension and that it may account for 1-10% of the 50 million people in the United States who have hypertension.

Read More on Medscape Reference »

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