Cardiologists are routinely overusing drug-coated stents to prop open blocked arteries in the heart rather than using bare-metal stents for patients at low-risk of another blockage, according to a study conducted by researchers at Massachusetts General Hospital and other institutions.
While drug-coated stents release medication to help prevent the artery from closing again — which would necessitate insertion of a second stent — they cost about $1,000 to $2,000 more than the bare-metal ones. Also, they require patients to take anticlotting drugs for at least a year, increasing the risk of internal bleeding and burdening patients with out-of-pocket costs.