单词：open-heart_surgery 

名词

• 
  [1.n.open-heart_surgery] (同义词:[open-heart_surgery(n. 〈医〉心内直视手术 )]  )
• 
  注释列句：heart surgery in which the rib cage is spread open, the heart is stopped and blood is detoured through a heart-lung machine while a heart valve or coronary artery is surgically repaired
• 上位词 -> [heart_surgery]  [operation( n. 运转, 操作, 实施, 作用, 业务, 工作, 手术, 军事行动 )]  [medical_procedure]  [procedure( n. 程序, 手续 )]  [activity( n. 活跃, 活动性, 行动, 行为, [核]放射性 )]  [act( n. 幕, 法案, 法令, 动作, 举动, 节目, (戏剧的)幕 vi. 行动, 产生...的效果, 担当, 表演, 假装, 表现, 见效 vt. 扮演, 装作 )]  [event( n. 事件, 事变, 结果, 活动, 精力, 竞赛 )]  [psychological_feature(心理特征 )]  [abstraction( n. 提取 )]  [entity( n. 实体 )] 
• 下位词 -> [coronary_bypass]