Coronary angioplasty involves dilating a balloon at the site of the blockage to enlarge the passage for blood flow in the coronary arteries. Most of the time, a stent will need to be implanted as a scaffold to keep the artery open. A drug eluting stent will deliver a drug locally to the vessel wall to prevent the blockage from coming back (restenosis). Primary angioplasty is done at the time of an acute heart attack as a life-saving procedure to open an artery blocked with blood clots.
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