Renal artery stenosis

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Kidney anatomy Kidney - blood and urine flow Kidney blood supply

Overview Symptoms Treatment Prevention

Renal artery stenosis

There are usually no symptoms.

The blood pressure may be high, and there may be a history of high blood pressure that doesn't respond to medication or is difficult to control. A bruit may be heard on examination with a stethoscope (auscultation) over the kidney.

• A radionuclide renogram may showdecreased blood flow. The value of radionuclide scanning is increased if the test is done twice: once after a dose of captopril and once without the captopril.
• An MRI, kidney CT scan, or kidney ultrasound may indicate a decreased size of the kidney, and/or a decrease in bloodflow through theartery becausethe artery has become narrow.
• Renal arteriography shows the exact location of the stenosed (blocked) area.

This disease may also alter the results of the following tests:

• Urine specific gravity
• Urine concentration test
• Renal perfusion scintiscan

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