The upper part of interface is the analysis for the front side of the heart, where the leads include:
I, -aVR, II, aVF, III, -aVL, -I, aVR, -II, -aVF, -III and aVL. Here the negative sign before lead
shows the direction of that lead is reverse with the lead without negative sign. The lower part of
interface is the analysis for the transverse plane of the heart, where the leads include: V1, V2, V3,
V4, V5, V6, -V1, -V2, -V3, -V4, -V5 and -V6. In normal conditions, the mark light at the right of
the chromatogram for corresponding lead is green. If chromatogram is abnormal according to the
above standard, the light will turn red for caution. You can modify or add interpretation