心律失常

例句：

1. 1. He had atrial fibrillation and was advised to see a cardiologist.
   他患有房颤，建议去看心脏病专家。
2. 2. The patient's heart rate is irregular, which can be dangerous.
   病人的心跳不规则，这很危险。
3. 3. During the procedure, the doctor noticed a rapid heartbeat, indicating arrhythmia.
   在手术过程中，医生注意到了快速心跳，表明有心律失常。