ventricular asynchronous pacing

例句：

1. 1. The heart's ventricles are responsible for pumping blood.
   心脏的心室负责泵血。
2. 2. Ventricular fibrillation is a serious condition that requires immediate medical attention.
   心室颤动是一种严重的状况，需要立即医疗关注。
3. 3.During the operation, the surgeon performed a ventricular septal defect repair.
   在手术中，外科医生进行了心室隔缺损修复。