Abstract:The sirolimus-eluting stent (SES) Cypher was the first commercially available drug-eluting stent. The use of this stent has resulted in significantly lower rates of restenosis and lesion revascularization compared to bare metal stents and balloon angioplasty. In this review, angiographic and clinical outcomes in patients treated with SES are compared to those treated with bare metal stents and other drug-eluting stents. Furthermore, efficacy and safety outcomes of SES in complex lesions (left main stenosis, bifurcation lesions, chronic total occlusions, long lesions and small vessels) and high risk populations (diabetes and acute myocardial infarction) are presented.