血管内放射治疗法已被证明是对支架置入术后再狭窄有效的疗法,然而该法伴有较高的失败率。该研究用于评估发生支架内再狭窄的患者重复接受血管内放疗的效果。 方法 选择51例接受血管内放射治疗后失败现又出现心绞痛并经血管造影证实为支架内再狭窄的患者作为治疗组,接受冠脉内介入治疗和重复血管内放射治疗。其中25例患者接受剂量为15Gy的γ辐射,另26例接受剂量为18.3～23Gy的β辐射。这51例患者所接受辐射累计剂 Endovascular radiotherapy has been shown to be an effective treatment for restenosis after stenting, however, this method has a higher failure rate. This study was designed to assess the effect of repeated intravascular radiotherapy in patients with in-stent restenosis. Methods Fifty-one patients with angina pectoris who failed after intravascular radiotherapy were selected as the treatment group undergoing coronary intervention and repeated intravascular radiotherapy. Of these, 25 received gamma radiation at a dose of 15 Gy and the other 26 received beta radiation at a dose of 18.3-23 Gy. The 51 patients received radiation cumulative dose