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Utilizing radio frequency energy and the heated catheter, the physician cauterizes â or burns â the tissue surrounding your saphenous vein to close it. Balloon angioplasty/stents for renal vascular hypertension is a procedure to open narrowed arteries that carry blood to your kidneys. It involves inserting a long, thin tube called a catheter through into the narrowed part of the artery.
When the arteries become narrowed, the condition is called carotid stenosis. A blockage in your carotid artery can reduce the blood supply to your brain. A stroke can occur if your brain does not get enough blood. There are two invasive ways to treat a carotid artery that is narrowed or blocked. One is surgery called endarterectomy. The other is a procedure called carotid angioplasty with stent placement. Source(s): http://en.wikipedia.org/wiki/Cerebral_hy...