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What is Stent, definition and Stents in arteries
Stent is a tiny, springlike device inserted into an ARTERY to help maintain the artery’s patency after ANGIOPLASTY (a CARDIAC CATHETERIZATION procedure to clear or compress ATHEROSCLEROTIC PLAQUE from the inner walls of an artery). The stent holds pressure against the artery’s inner wall, maintaining compression of the plaque as well as making it difficult for the artery to constrict. Cardiologists use stents primarily in the CORONARY ARTERIES though may also use them in carotid ENDARTERECTOMY and peripheral artery angioplasty. An anticoagulant medication coats some stents, called DRUG-emitting, to discourage clot formation.
Stents can extend the effectiveness of angioplasty by months to a year or more. Angioplasty with stent placement can delay the need for CORONARY ARTERY BYPASS GRAFT (CABG) or provide an acceptable alternative for people with less severe occlusions. Most stents require replacement every three to five years.