electrocardiogram

例句：

1. 1.He was diagnosed with atrial fibrillation, which requires regular electrocardiograms to monitor his heart rhythm.
   他被诊断出患有房颤，需要定期进行心电图检查来监测他的心律。
2. 2.The doctor ordered an electrocardiogram for the patient's safety.
   医生为了患者的安全，为患者安排了心电图检查。
3. 3.During the test, the technician recorded the patient's electrocardiogram and analyzed it for any abnormalities.
   在测试期间，技术人员记录了患者的心电图并对其进行分析，以查找任何异常情况。