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First clinical trial of nitinol self-expanding everolimus-eluting stent implantation for peripheral arterial occlusive disease.

BACKGROUND: A novel self-expanding drug-eluting stent was designed to slowly release everolimus to prevent restenosis following peripheral arterial intervention. The purpose of the first-in-human Superficial Femoral Artery Treatment with Drug-Eluting Stents (STRIDES) trial was to evaluate the safety and efficacy of this device for the treatment of symptomatic superficial femoral and proximal popliteal arterial occlusive disease.

METHODS AND RESULTS: One hundred four patients were enrolled at 11 European investigative centers in a prospective, nonrandomized, single-arm trial. The patients had severe symptomatic vascular disease, including a significant proportion of patients with critical limb ischemia (17%), diabetes (39%), and single-vessel outflow (26%). The mean lesion length was 9.0 ± 4.3 cm. Ninety-nine percent of patients were available for 12-month follow-up, including duplex imaging in 90% and arteriography in 83%. Clinical improvement, defined as a sustained decrease in Rutherford-Becker clinical category, was achieved in 80% of patients. Primary patency (freedom from ≥50% in-stent restenosis) was 94 ± 2.3% and 68 ± 4.6% at 6 and 12 months, respectively. Plain radiographic examination of 122 implanted devices at 12 months revealed no evidence for stent fracture.

CONCLUSIONS: The everolimus-eluting self-expanding nitinol stent can be successfully implanted in patients with severe peripheral arterial disease with favorable outcomes and clinical improvements observed in the majority of patients.

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