cardiac tube

例句：

1. 1. The patient's heart rate is elevated, indicating a cardiac issue.
   患者的心率升高，表明有心脏问题。
2. 2. The cardiac surgeon performed the surgery on the patient.
   心脏外科医生为患者进行了手术。
3. 3. Cardiac arrest is a medical emergency that requires immediate attention.
   心脏骤停是一种需要立即关注的医疗紧急情况。