text_1: 冠状动脉 左 主干 病变 患者 接受 当代 药物 洗脱 支架 经皮 冠状动脉 介入 治疗 ( PCI ) 与 接受 冠状动脉 旁路 移植术 ( CABG ) 后 的 长期 结局 尚未 明确 .
  
text_2: long @-@ term outcomes after percutaneous coronary intervention ( PCI ) with contemporary drug @-@ eluting stents , as compared with coronary @-@ artery bypass grafting ( CABG ) , in patients with left main coronary artery disease are not clearly established .
  