Coronary stents are small, wire, mesh tubes that help widen a clogged artery and restore adequate blood flow to the heart. When plaque builds up in a coronary artery, it can narrow the artery. This coated type of stent is known as a drug-eluting stent. Early generations of stents were made. For most patients undergoing percutaneous coronary intervention with stenting, current-generation drug-eluting stents (DES) are preferred to bare metal stents due to a significantly lower risk of the need for target vessel revascularization and the absence of any safety benefits for bare metal.