atrial flutter

例句：

1. 1. He was diagnosed with atrial flutter after undergoing surgery.
   他在手术之后被诊断出患有心房颤动。
2. 2.Atrial flutter is a serious condition that requires immediate medical attention.
   心房颤动是一种严重的状况，需要立即就医。
3. 3.The patient's heart rate increased significantly during the atrial flutter episode.
   在心房颤动发作期间，患者的心率显著增加。