全世界每年约有1000万名冠心病（CHD）患者，今年将有180万CHD患者接受冠脉血管重建术，其中2／3为经皮冠脉血管重建术（PCR）。这项本世纪70年代末出现的介入治疗技术虽然在近20年获得了突飞猛进的发展，但一直被再狭窄所困扰。目前常用的再狭窄概念指介入治疗后的病变血管腔 Approximately 10 million coronary heart disease (CHD) patients worldwide each year will have 1.8 million CHD patients undergoing coronary revascularization this year, of which two-thirds are percutaneous coronary revascularization (PCR). Although this interventional therapy technology emerged in the late 1970s has made rapid progress in recent 20 years, it has been plagued by restenosis. The current concept of restenosis refers to the lesion vessel lumen after interventional therapy