Background: The ridaforolimus-eluting stent (RES) system is a novel cobalt alloy-based coronary stent with a durable elastomeric polymer eluting ridaforolimus. The aim of this trial was to assess the performance of a 38 mm RES in long coronary lesions.
Methods: A prospective, multicenter, single-arm, open-label clinical trial. Clinical follow-up was performed at 30 days, 6 months, and 1 year after the procedure. Target lesions were located in native coronary arteries or bypass graft conduits, with visually estimated diameters of ≥2.75 mm to ≤4.25 mm. The primary endpoint was combined efficacy (final in-stent residual diameter stenosis <30%) without 30-day major adverse cardiovascular events (MACE) (composite of cardiac death, any myocardial infarction), or ischemia-driven target lesion revascularization.
Results: A total of 50 patients were enrolled in the study. Fourteen (28%) had acute coronary syndromes; 17 (34%) had diabetes. The mean lesion length was 32.4 mm ± 8.3, reference vessel diameter 2.88 mm ± 0.45, minimal lumen diameter 0.80 mm ± 0.41, and percent diameter stenosis 72.6% ± 13.2. The primary endpoint was achieved in 88% (44/50) of the patients (95% confidence interval: 75.7-95.5%). Thirty-day and 1-year MACE rates were 6% and 8%, respectively. Target lesion failure after 1 year occurred in three patients (6%). Forty-seven lesions (94%) were treated successfully, with final in-stent diameter stenosis of < 30% [95% confidence interval: (84-99%).
Conclusion: Percutaneous coronary intervention (PCI) of long lesions with a 38 mm RES achieved satisfactory results, and support the safety and efficacy of PCI with RES in patients with long lesions. (ClinicalTrials.gov NCT03702608).
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