The safety and efficacy of drug-eluting stents (DES) with a biocompatible polymer have been demonstrated in randomized clinical trials as well as in real world practice. Theoretically, a new DES with a biodegradable polymer should reduce the incidence of late in-stent thrombosis, however, the long-term safety and efficacy of these stents remains unknown. This study was aimed to compare the safety and efficacy of the Excel DES with a biodegradable polymer to the Endeavor DES with a biocompatible polymer in same individuals.