Background: Early-generation drug-eluting stents (DESs) have been shown to accelerate neoatherogenesis. Limited optical coherence tomography (OCT) data on the very long-term neoatherosclerotic progression after DES implantation are available.
Aim: The aim of this study was a serial OCT evaluation of neoatherosclerosis at three and nine years after implantation of sirolimus-eluting stents (SESs) and paclitaxel-eluting stents (PESs).
Methods: Consecutive patients undergoing elective percutaneous coronary intervention with SES (Cypher, Cordis) or PES (Taxus, Boston Scientific) were included in this single-centre, longitudinal study. OCT analysis was performed after three and nine years by an independent core laboratory.
Results: A total of 39 OCT recordings were assessed at three years after the index procedure; of them, 22 (eight SES and 14 PES) OCT pullbacks were evaluated in a paired analysis at three and nine years post implantation. Overall, neoatheroscle-rosis was identified in 23.1% of stents at three years and in 30.8% at nine years after the index procedure (p = 0.289). No features of significant neoatherosclerotic progression were found in either group between three- and nine-year assessment.
Conclusions: At nine years after implantation of early-generation DES no significant neoatherosclerotic progression was observed among patients with uneventful follow-up at three years after PCI, as assessed by OCT. These observations need to be confirmed in larger studies including the current generation of DESs.
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