Abstract
Background: Long-term outcomes following implantation of drug-eluting coronary stents are necessary to determine safety and efficacy.
Aims: We aimed to report the 5-year outcomes of the SYNERGY thin-strut biodegradable-polymer everolimus-eluting platinum-chromium stent (EES) versus the BioMatrix NeoFlex biodegradable-polymer biolimus-eluting stainless-steel stent (BES).
Methods: This randomised, multicentre, all-comer, non-inferiority trial was undertaken at three sites in Western Denmark. Patients with a clinical indication for percutaneous coronary intervention were eligible for inclusion. Patients were randomly assigned (1:1) to either EES or BES. Outcomes included target lesion failure (TLF: cardiac death, myocardial infarction not clearly attributable to a non-target lesion, or target lesion revascularisation), all myocardial infarctions, and very late stent thrombosis at 5-year follow-up.
Results: We included 2,764 patients and randomly assigned 1,385 patients to treatment with EES and 1,379 patients to treatment with BES. TLF occurred in 150 patients (10.8%) assigned to the EES and in 165 (12.0%) assigned to the BES (rate ratio [RR] 0.88, 95% confidence interval [CI]: 0.71-1.10). The incidence of myocardial infarction was lower in the EES group (EES: n=85 [6.1%], BES: n=116 [8.4%]; RR 0.71, 95% CI: 0.54-0.95), while very late stent thrombosis was rare for both stent types (EES: n=12 [0.9%], BES: n=9 [0.7%]; RR 1.32, 95% CI: 0.56-3.14).
Conclusions: At 5-year follow-up, TLF was comparable for EES and BES. The incidence of myocardial infarction, however, was lower in patients randomised to EES versus BES implantation.
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