1.The patient should be in sitting position, the doctor will wipe the skin where the electrode is to be attached with 95% alcohol gauze or other degreasing agent; 2.The doctor will tape the electrode piece to the selected position on the patient’s forehead, smooth the lead line and tie it with bandage to prevent the electrode piece from falling off and being disturbed; 3.The doctor will turn on the recorder, check the time, mark the start time on the patient’s diary, and put the recorder into a small satchel and hang it on the During the 24 hours, the patient will wear the recorder for daily activities and the recorder will record the patient’s ECG in different positions; 5. After 24 hours, the patient will bring the diary to the ECG room or the designated place to remove the recorder.