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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.
1 When a catheter is used to clear a narrowed or blocked artery, the procedure is called angioplasty or a percutaneous coronary intervention (PCI). 2  When a catheter is used to widen a narrowed heart valve opening, the procedure is called valvuloplasty.  The doctor will remove the catheters and the sheath.