sinus arrhythmia

例句：

1. 1.He had a sinus arrhythmia that made it hard for him tobreathe.
   他患有窦房结脱节，这让他呼吸困难。
2. 2. The patient'sheart rate was unusually high, whichcould be due to sinus arrhythmia.
   患者的心率异常高，这可能是由于窦房结脱节引起的。
3. 3. Duringthe exam, the doctor noticed a sinus arrhythmia and advised thepatient to rest.
   在检查过程中，医生注意到了窦房结脱节，并建议患者休息。