Abstract
OBJECTIVES: The aim of this study was to compare the safety and efficacy of everolimus-eluting stent (EES), sirolimus-eluting stent (SES), and plain old balloon angioplasty (POBA) for the treatment of SES in-stent restenosis (S-ISR). BACKGROUND: The optimal treatment for drug-eluting in-stent restenosis remains controversial. METHODS: The study cohort comprised 310 consecutive patients (444 lesions) who presented with S-ISR to our institution and underwent treatment with EES (43 patients), SES (102), or POBA (165). The analyzed clinical parameters were the 1-year rates of death, Q-wave myocardial infarction (MI), target lesion revascularization (TLR), target vessel revascularization (TVR), definite stent thrombosis (ST) and major adverse cardiac event (MACE) defined as the composite of death, MI, or TLR at 1-year. RESULTS: The three groups were well matched for the conventional risk factors for coronary artery disease except for smoking. The 1-year analyzed clinical parameters were similar in the three groups: MACE (EES=14%, SES=18%, POBA=20%; p=0.65), death (EES=2.3%, SES=6.2%, POBA=6.1%; p=0.61), MI (EES=4.8%, SES=2.1%, POBA=2.5%; p=0.69), TLR (EES=11.9%, SES=12.1%, POBA=24%; p=0.78), and TVR (EES=11.9%, SES=24.8%, POBA=22.2%; p=0.23). There were no cases of definite ST. MACE-free rate was significantly lower in patients with recurrent in-stent restenosis (log-rank p=0.006). Presentation with acute MI, number of treated lesions and a previous history of MI were found to be independent predictors of MACE. CONCLUSIONS: In patients presenting with S-ISR, treatment with implantation of an EES, SES, or POBA is associated with similar clinical outcomes. Patients presenting with recurrent ISR may have a poorer clinical outcome.