Rarely, renal artery stenosis results from other conditions such as inflammation of the blood vessels or a growth that develops in your abdomen and presses on your kidneys' arteries. Narrowed kidney arteries and fibromuscular dysplasia can affect other arteries in your body as well as your kidney arteries and cause complications. Experts don't know what causes fibromuscular dysplasia, but the condition is more common in women and may be something that's present at birth (congenital). This can lead to high blood pressure at a young age. The renal artery can narrow so much that the kidney doesn't get enough blood. The renal artery can have narrow sections alternating with wider sections, giving a bead-like appearance in images of the artery. In fibromuscular dysplasia, the muscle in the artery wall doesn't grow as it should. Atherosclerosis occurs in many areas of the body and is the most common cause of renal artery stenosis.įibromuscular dysplasia. As these deposits get larger, they can harden, reduce blood flow, cause kidney scarring and eventually narrow the artery. Fats, cholesterol and other substances (plaque) can build up in and on your kidney artery walls (atherosclerosis). The two main causes of renal artery stenosis include: Make an appointment with your doctor if you have any persistent signs or symptoms that worry you. Fluid overload and swelling in your body's tissues.Worsening kidney function during treatment for high blood pressure.Elevated protein levels in the urine or other signs of a problem with kidney function.A whooshing sound as blood flows through a narrowed vessel (bruit), which your doctor hears through a stethoscope placed over your kidneys.High blood pressure that's hard to control.High blood pressure that begins before age 30 or after age 50Īs renal artery stenosis progresses, other signs and symptoms may include:.High blood pressure that begins suddenly or worsens without explanation.Your health care provider may also suspect a problem if you have: The condition may be discovered incidentally during testing for something else. Renal artery stenosis often doesn't cause any signs or symptoms until it's advanced.
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