Renal Artery Stenosis

What is renal artery stenosis?

Renal artery stenosis (RAS) is the narrowing of one or both of the renal arteries. These arteries supply your kidneys with blood.

What causes RAS?

Most of the time, RAS is caused when plaque – a sticky substance made of fat, cholesterol, calcium and other material – builds up on the artery walls. This causes atherosclerosis – the clogging, narrowing and hardening of the arteries.

Another cause of RAS is fibromuscular dysplasia (FMD). This is abnormal development or growth of cells on the artery walls.

What are the symptoms of RAS?

Unfortunately, RAS may show no symptoms until it becomes severe. Signs you can be aware of include high blood pressure and/or decreases kidney function.

Who is at risk for RAS?

You may be at risk of RAS if you:

  • Have high cholesterol
  • Have high blood pressure
  • Smoke
  • Have diabetes
  • Are overweight
  • Do not exercise regularly
  • Eat a diet high in fat, cholesterol, sodium and sugar
  • Are a man older than 45
  • Are a woman older than 55
  • Have a family history of early heart disease



Treatment may include lifestyle changes, medication and/or surgery.

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Treatments for Renal Artery Stenosis

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Symptoms and Screenings for Renal Artery Stenosis

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Causes and Preventions for Renal Artery Stenosis

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Education and Resources for Renal Artery Stenosis

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Support groups for Renal Artery Stenosis

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Learn More about Renal Artery Stenosis

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