The method of examining electrocardiogram

The ECG is examined clinically using an ECG machine.

The subject remains supine, breathing steadily, and the skin on both wrists, ankles, and chest is exposed. Before switching on the electrodes, the doctor will wipe the skin on both wrists, ankles, and chest of the subject, keeping the skin moist locally so that the electrodes conduct electricity. The electrodes will be switched on in a fixed order, i.e. red on the right wrist, yellow on the left wrist, black on the right ankle, and green on the left ankle. After that, according to the sequence of V1, V2, V3, V4, V5 and V6, the lead can be prevented in the chest. After all the prevention is completed, the ECG spectrum can be traced and printed, and then the lead and electrode can be removed.