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1.The endocardial lead was placed in the patient's chest to monitor his heart rhythm.
将心内膜导线放置在患者的胸部以监测他的心脏节律。
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2.During surgery, the endocardial lead was used to detect any abnormalities in the heart's electrical activity.
在手术期间，心内膜导线被用来检测心脏电活动的任何异常。
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3. The endocardial lead was removed after the procedure, and the patient was monitored for any signs of infection.
在手术完成后，移除了心内膜导线，并对患者进行了感染迹象的监测。