1, number of electrodes: 12 lead ECG uses 12 electrode pads, 15 lead ECG uses 15 electrode pads, which are placed in the right chest anterior region, left back and lower abdomen respectively.
2. Monitoring range: Twelve-lead ECG can monitor the electrical activity of the heart, and the range is relatively limited. Fifteen-lead ECG can monitor the electrical activity of the heart more comprehensively, including more ECG information.