Unrestricted use of endeavor resolute zotarolimus-eluting stent in daily clinical practice: a prospective registry

BACKGROUND: To evaluate the safety and efficacy of unrestricted Endeavor Resolute zotarolimus-eluting stent (ZES) use. Furthermore, we sought to evaluate clinical outcomes associated with on- and off-label use of Resolute ZES. METHODS: The current study was a prospective, single-center registry. The primary endpoint was major adverse cardiac events (MACE), defined as the composite of death, myocardial infarction (MI), and target-vessel revascularization (TVR). Secondary endpoints were death, MI, TVR, and stent thrombosis (ST). RESULTS: A total of 370 patients were prospectively enrolled. Off-label Resolute ZES use was performed in 311 patients (84%). At a mean follow-up of 17.3 ± 6 months, MACE occurred in 31 patients (8.5%), death in 15 (4.1%), MI in 10 (2.7%), and TVR in 19 (5.2%). Definite, probable, and possible ST occurred in 9 patients (2.5%). Off-label Resolute ZES implantation, as compared to on-label use, was not associated with an increased risk of MACE (9.4% vs 3.4%; P=.13), death (4.9% vs 0%; P=.14), MI (3.3% vs 0%; P=.38), and TVR (5.5% vs 3.4%; P=.75). On multivariable analysis, previous revascularization (P=.008), but not off-label Resolute ZES implantation (P=.07), was associated with MACE. CONCLUSIONS: In daily clinical practice, Resolute ZES was mostly implanted in patients with off-label indications and associated with a relatively low rate of MACE and TVR.