Circulation. 2002;105:1883-1886
Published online before print April 1, 2002, doi: 10.1161/01.CIR.0000016042.69606.61
Published online before print April 1, 2002, doi: 10.1161/01.CIR.0000016042.69606.61
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(Circulation. 2002;105:1883.)
© 2002 American Heart Association, Inc.
Brief Rapid Communications |
First Clinical Experience With a Paclitaxel Derivate–Eluting Polymer Stent System Implantation for In-Stent Restenosis
Immediate and Long-Term Clinical and Angiographic Outcome
From Catheterization Laboratories, Ospedale San Raffaele, and Emo Centro Cuore Columbus, Milan, Italy.
Correspondence to Antonio Colombo, MD, EMO Centro Cuore Columbus Hospital, Via M. Buonarroti 48, 20145, Milan, Italy. E-mail columbus{at}micronet.it
Background— It has been shown that antiproliferative drugs such as paclitaxel lower the amount of intimal hyperplasia after stent implantation. We report the first clinical experience of 7-hexanoyltaxol (QP2)–eluting polymer stent system (QuaDS) implantation for in-stent restenosis.
Methods and Results— Fifteen consecutive patients with elective indication to percutaneous coronary intervention for in-stent restenosis were treated with the QuaDS-QP2 stent implantation. The QuaDS-QP2 stent was successfully implanted in all but 2 target lesions. In one lesion, the restenotic segment could not be completely covered by the stent, and in another lesion, a bare metal stent was implanted distally to the QuaDS-QP2 stent. One patient suffered from postprocedural non–Q-wave myocardial infarction (NQWMI). No other adverse events were observed during hospital stay. Six- and 12-month angiographic and clinical follow-up was scheduled for all patients. At 6 months, 3 patients had target lesion revascularization (20%). Two patients had restenosis (13.3%); one experienced restenosis in a gap between 2 drug-eluting stents, and the other had stent occlusion leading to NQWMI. Minimal intimal hyperplasia was observed in all the segments covered by drug-eluting stents (late loss=0.47±1.01 mm with a loss index=0.17±0.39). At 12 months, 1 patient suffered from NQWMI, and 8 of 13 patients (61.5%) had angiographic restenosis (late loss=1.36±0.94 mm with a loss index=0.62±0.44).
Conclusion— This first experience with QuaDS-QP2 stent implantation for in-stent restenosis revealed minimal intimal hyperplasia at the 6-month follow-up. However, the antiproliferative effect was not maintained at the 12-month follow-up, resulting in delayed occurrence of angiographic restenosis.
Key Words: restenosis • stents • angiography
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