Randomized comparison of carbon ion–implanted stent versus bare metal stent in coronary artery disease: The Asian Pacific Multicenter Arthos Stent Study (PASS) trial - 21/08/11
Reprint requests: Seung-Jung Park, MD, PhD, Department of Medicine, College of Medicine, Asan Medical Center, University of Ulsan, 388-1 Poongnap-dong, Songpa-gu, Seoul 138-736, Republic of Korea.Résumé |
Background |
Heavy metal ions can cause allergic and inflammatory reactions that might be associated with in-stent restenosis. This randomized multicenter clinical study was designed to determine if carbon ion–implanted stents reduce luminal late loss by blocking heavy metal ion diffusion into the surrounding tissue.
Methods |
A total of 225 patients with 230 native coronary lesions were randomly assigned to receive either a carbon ion–implanted ArthosInert stent (group 1, n = 113) or a bare metal Arthos stent (group 2, n = 117). The primary endpoint was in-stent luminal late loss at 6-month angiographic follow-up, and the secondary endpoints were the 6-month angiographic restenosis rate and the occurrence of the major adverse cardiac events (MACE) including death, nonfatal myocardial infarction, and target lesion revascularization at 12 months.
Results |
The baseline characteristics were similar in the 2 groups. In-hospital events did not occur in any patients. Angiographic follow-up at 6 months was obtained in 184 lesions (80%). At follow-up, the luminal late loss was similar in the 2 groups (0.91 ± 0.77 mm in group 1 vs 0.88 ± 0.80 mm in group 2, P = .79), and the angiographic restenosis rates were 11.0% in group 1 and 16.1% in group 2 (P = .31). The occurrence rates of MACE at 12 months were 9.1% in group 1 and 10.4% in group 2 (P = .73).
Conclusions |
The initial and long-term outcomes of the carbon ion–implanted stent were excellent. However, it did not improve long-term outcomes vs the bare metal stent.
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| This study was partly supported by Cardiovascular Research Foundation, Seoul, Korea. |
Vol 149 - N° 2
P. 336-341 - février 2005 Retour au numéro
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