bradycardia

例句：

1. 1. The patient's heart rate was significantly slower than normal.
   患者的心率明显低于正常水平。
2. 2. The doctor prescribed medication to help regulate the patient's slow heart rate.
   医生开了药来帮助调节患者缓慢的心率。
3. 3. Bradycardia can be a symptom of various medical conditions, including heart disease and certain medications.
   缓慢的心跳可能是各种医学状况的症状，包括心脏病和某些药物。