The purpose of this study is to evaluate the efficacy and safety of successful interventional therapy and unblocked blood vessel maintaining in the treatment of coronary in-stent restenosis by paclitaxel -eluting PTCA- balloon catheter (3μg/mm2 balloon surface area) versus paclitaxel-eluting stent Taxus® Liberte, and the reference diameter of coronary artery stenosis is 2.5mm-4.0mm and the length ≤30mm.
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Late lumen loss in segment section at M9
Timeframe: One year