on June 17, 2002
Published online before print June 17, 2002, doi: 10.1161/01.CIR.0000019743.11941.3B
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Submitted on March 22, 2002
From the Department of Cardiology, Kokura Memorial Hospital, Kitakyushu, Japan. * To whom correspondence should be addressed. E-mail: kmhptca{at}nn.iij4u.or.jp.
Background—Although coronary stents have been proved effective in reducing clinical cardiac events for up to 3 to 5 years, longer term clinical and angiographic outcomes have not yet been fully clarified. Methods and Results—To evaluate longer term (7 to 11 years) outcome, clinical and angiographic follow-up information was analyzed in 405 patients with successful stenting in native coronary arteries. Primary or secondary stabilization, which was defined as freedom from death, coronary artery bypass grafting, and target lesion--percutaneous coronary intervention (TL-PCI) during the 14 months after the initial procedure or after the last TL-PCI, was achieved in 373 patients (92%) overall. Only 7 patients (1.7%) underwent TL-PCI more than twice. After the initial 14-month period, freedom from TL-PCI reached a plateau at 84.9% to 80.7% over 1 to 8 years. However, quantitative angiographic analysis in 179 lesions revealed a triphasic luminal response characterized by an early restenosis phase until 6 months, an intermediate-term regression phase from 6 months to 3 years, and a late renarrowing phase beyond 4 years. Minimal luminal diameter in 131 patients with complete serial data were 2.62±0.4 mm immediately after stenting, 2.0±0.49 mm at 6 months, 2.19±0.49 mm at 3 years, and 1.85±0.56 mm beyond 4 years (P<0.0001). Conclusions—The efficacy and safety of coronary stenting seemed to be clinically sustained at 7 to 11 years of follow-up. However, late luminal renarrowing beyond 4 years was common, which demonstrates the need for further follow-up.
Revised on April 12, 2002
Accepted on April 15, 2002
Long-Term Clinical and Angiographic Follow-Up After Coronary Stent Placement in Native Coronary Arteries
Takeshi Kimura MD,
Key words: stents • restenosis • angioplasty
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