COMPARATIVE STUDY
JOURNAL ARTICLE
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Outcome of ST-elevation myocardial infarction versus non-ST-elevation acute coronary syndrome treated with titanium-nitride-oxide-coated versus everolimus-eluting stents: insights from the BASE-ACS trial.

AIM: The BASE-ACS trial demonstrated an outcome of titanium-nitride-oxide-coated bioactive stents (BAS) that was statistically non-inferior to that of everolimus-eluting stents (EES) at 12-month follow-up, in patients presenting with acute coronary syndrome (ACS) who underwent early percutaneous coronary intervention (PCI). We explored a post-hoc analysis of the 12-month outcome of the BASE-ACS trial in the subgroup of patients with ST-elevation myocardial infarction (STEMI) versus non-ST-elevation ACS (non-STEACS).

METHODS: A total of 827 patients with ACS (321 STEMI) were randomly assigned to receive either BAS or EES. The primary endpoint was a composite of cardiac death, non-fatal myocardial infarction (MI) and ischemia-driven target lesion revascularization (TLR) at 12-month follow-up.

RESULTS: The 12-month cumulative incidence of the primary endpoint was similar between the two subgroups (9% versus 9.5%, in STEMI versus non-STEACS patients respectively, P=0.90). The 12-month rate of cardiac death was significantly higher in the STEMI subgroup as compared with the non-STEACS subgroup (2.8 versus 0.6%, respectively, P=0.01). However, the rates of non-fatal MI, ischemia-driven TLR, definite stent thrombosis, and non-cardiac death were all statistically matched between the two subgroups (P>0.05 for all).

CONCLUSION: In the current post-hoc analysis of the BASE-ACS trial based on the infarction type, the 12-month outcome of patients who underwent early PCI for ACS was slightly worse in the setting of STEMI as compared with non-STEACS, as reflected by a significantly higher rate of cardiac death.

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