left heart bypass system

例句：

1. 1.The patient's condition improved significantly after the surgery.
   手术后，患者的病情有了很大的改善。
2. 2.The left heart bypass system is a life-saving procedure for patients with severe heart disease.
   左心室旁路系统是严重心脏病患者的生命挽救手术。
3. 3.The doctors explained that the left heart bypass system was essential for the patient's recovery.
   医生解释说，对于患者的康复来说，左心室旁路系统是必不可少的。