再狭窄仍然是经皮腔内冠状动脉成形术（ＰＴＣＡ）的主要限制。虽然冠状动脉支架能减少所选择的相对大的血管（直径＞３ｍｍ）的病人的再狭窄发生率，尚无资料证实其在＜３ｍｍ直径的血管中的有益作用。相反，有资料表明支架植入反而增加了血栓形成的危险。已知强抗氧化剂... Restenosis remains the major limitation of percutaneous transluminal coronary angioplasty (PTCA). Although coronary stents reduce the incidence of restenosis in selected relatively large blood vessels (> 3 mm in diameter), there is no data to prove their beneficial effect in <3 mm diameter blood vessels. In contrast, data suggest that stenting instead increases the risk of thrombosis. Known strong antioxidants ...