Precautions for using ECG to record the condition

The following should be noted when recording an ECG:

① In order to prevent the electrocardiogram artifact caused by muscle tremor, the patient must lie down and relax the whole body

②Connect the limb lead electrodes and wires, and make sure the connection is correct

③ Mark the electrocardiograph 1mV

④ Record 6 standard limb lead ECG

⑤ Record 6 precordial lead ECG

⑥ Record 3 or 4 cycles per lead, and the recording time should be appropriately extended in case of arrhythmia.