This document summarizes coronary stents, including their purpose, types, history, procedure for placement, and future advancements. Stents are small mesh devices that are placed in arteries to keep them open and improve blood flow after balloon angioplasty. There are bare metal stents and drug-eluting stents, which combat re-narrowing after placement. The first coronary stent was placed in 1986, and drug-eluting stents were introduced in 2001 to further reduce re-narrowing. Placement involves threading a catheter through an artery to the blockage and expanding a balloon and stent to open the artery. Future advancements include bioresorbable polymers that dissolve after artery healing is complete.