Comparison of zotarolimus- and everolimus-eluting stents in patients with ST-elevation myocardial infarction and chronic kidney disease undergoing primary percutaneous coronary intervention

BackgroundChronic kidney disease (CKD) is associated with poor outcomes after percutaneous coronary intervention (PCI). The aim of the study was to compare zotarolimus- and everolimus-eluting stents used during primary PCI in patients with acute myocardial infarction (AMI) and CKD.MethodsWe selected 854 consecutive ST-elevation MI patients with CKD (estimated glomerular filtration rate <60 mL/min/1.73 m2) undergoing primary PCI who were followed up for 12 months. They were divided into two groups based on type of stents implanted: (1) zotarolimus-eluting stent (ZES) and (2) everolimus-eluting stent (EES). The study end point was the 12-month major adverse cardiac events (MACE) which included all-cause death, non-fatal MI, target lesion revascularization (TLR), and target vessel revascularization (TVR).ResultsThe average number of stents used per vessel was 1.4 ± 0.7. A total of 433 patients received ZES and 421 patients received EES. There was no significant difference in the incidence of 12-month MI, TLR, or TVR. All-cause death was found to be borderline significant between two groups (2.8% in ZES vs 0.9% in EES, p = 0.05). The incidence of 12-month MACE in ZES and EES was 5.7% and 2.6% respectively, p = 0.022. Stent thrombosis did not differ between groups (p = 0.677). Kaplan-Meier analysis did not show significant difference for 12-month MACE-free survival between groups (log-rank p = 0.158). It remained the same even after propensity adjustment for multiple confounders in Cox model (p = 0.326).ConclusionsImplantation of ZES or EES provided comparable clinical outcomes with similar risk of 12-month MACE and death in STEMI patients with CKD undergoing primary PCI.