Safety and Efficacy of Overlapping Homogenous Drug-Eluting Stents in Patients with Acute Myocardial Infarction: Results from Korea Acute Myocardial Infarction Registry

The aim of this study was to compare safety and efficacy of 4 homogenous overlapping drug-eluting stents (DES) in acute myocardial infarction (AMI) patients. We selected 1,349 consecutive patients (62.1 ± 14.9 yr, 69.4% male) who received homogenous overlapping DESs in diffuse de novo coronary lesions from Korea Acute Myocardial Infarction Registry from April 2006 through September 2010. They were divided into 4 groups based on type of DES implanted - Paclitaxel (PES), Sirolimus (SES), Zotarolimus (ZES) and Everolimus (EES)-eluting stents. Primary endpoint was 12-month MACE. We also studied EES versus other DESs (PES + SES + ZES). Mean stent length was 26.2 ± 7.5 mm and mean stent diameter was 3.1 ± 0.4 mm. Average number of stents used per vessel was 2.2 ± 0.5. Incidence of major adverse cardiac events (MACE) in PES, SES, ZES, and EES groups were 9.5%, 9.2%, 7.5%, and 3.8%, respectively (P = 0.013). In EES group, overall MACE and repeat revascularization were lowest, and no incidence of stent thrombosis was observed. Non-fatal MI was highest in PES, almost similar in SES and EES with no incidence in ZES group (P = 0.044). Cox proportional hazard analysis revealed no differences in the incidence of primary endpoint (P = 0.409). This study shows no significant differences in 12-month MACE among 4 groups.