The six precordial leads are called leads V1, V2, V3, V4, V5 and V6. Below is a normal 12-lead ECG tracing. The different parts of the ECG will be described in the following sections. A normal ECG ...

One can either use calculated sums of the amplitudes of QRS complexes of all 12 leads ... that the use of the ECG along these lines in the care of patients with CHF will lead to further progress.