Angiographic characteristics of the lesion.

Continuous data are presented as mean±SEM, categorical data as absolute numbers. Comparison between patients with RCA and with SVG-RCA by unpaired t test (continuous data) and 2-tailed Fisher’s exact test (categorical data). IVUS = intravascular ultrasound; MLA = minimal lumen cross-sectional area in the culprit segment; RCA = native right coronary artery; RLA = reference lumen area; SVG-RCA = saphenous vein graft on right coronary artery. Angiographic characteristics of the lesion.连续数据以均值±标准误（SEM）表示，分类数据以绝对数形式呈现。采用非配对t检验（针对连续数据）及双侧Fisher确切概率法（针对分类数据），比较自身右冠状动脉（native right coronary artery，RCA）病变患者与右冠状动脉隐静脉移植物（saphenous vein graft on right coronary artery，SVG-RCA）病变患者的相关差异。缩写定义如下：血管内超声（intravascular ultrasound，IVUS）；罪犯病变节段最小管腔横截面积（minimal lumen cross-sectional area in the culprit segment，MLA）；自身右冠状动脉（native right coronary artery，RCA）；参考管腔面积（reference lumen area，RLA）；右冠状动脉隐静脉移植物（saphenous vein graft on right coronary artery，SVG-RCA） 病变的血管造影特征。