Renal artery is the main blood vessel that supplies the kidneys with blood. Renal angioplasty is used to treat a condition called renal artery stenosis, which is narrowing of renal arteries.

Renal artery stenosis usually happens when fatty deposits (plaques) build up in the walls of your arteries. This is called atherosclerosis that causes blockages of renal arteries to  restricting blood flow to kidney.

Sometimes renal artery stenosis is caused by a condition called fibrodysplasia.

Renal angioplasty is used to open up the narrowing of your renal arteries. This can improve the blood flow to kidneys and reduce the symptoms of renal artery stenosis.  One may have a small metal tube called a stent inserted into your artery and left inside to hold it open.

Narrowing or blockage of the renal artery can cause severely high blood pressure or problems with kidney function. Renal angioplasty and stenting can help improve blood flow to the kidney and relieve problems.