sentences:  By the end of 2004, drug-eluting stents were used in nearly 80 percent of all percutaneous coronary interventions.Trials of heparin-coated stents could not match the significant decrease in restenosis rates seen with the Cypher and Taxus stents.With the increased supply in the chemotherapeutic drug-eluting stents available, the use of heparin-coated stents waned.