The multi lead electrocardiograph is one of the electrocardiographs. It is more advanced than the single-lead electrocardiograph. It can simultaneously make multiple lead electrocardiograms, which can help the diagnosis of diseases by printing patient information and presenting it in paper form. It is mainly used to diagnose cardiac abnormalities, determine the patient's response to medication, and reveal trends and changes of cardiac function. The multi channel electrocardiograph has multiple channels of amplification, three, six, twelve, and eighteen, which can record two or more abnormal signals simultaneously. For example, the twelve-lead ECG machine has twelve amplifiers, which can reflect the simultaneous changes of the ECG signals of twelve leads at a certain time.
Multi-channel electrocardiographs are mainly used to exchange patient information by printing patient information and presenting it in paper form. Clinically, 12-lead ECG is more common.
The 12-lead leads include: limb leads I, II, III, aVR, aVL, aVF, and chest leads V1, V2, V3, V4, V5, and V6.
The eighteen leads include: limb leads I, II, III, aVR, aVL, aVF and chest lead V1, V2, V3, V4, V5, V6 a total of 12 leads and right chest lead V3R, V4R, V5R and the left posterior chest wall V7, V8, V9 lead.