This ECG also meets the Brugada Criteria for concordance. In this LBBB pattern, all the QRS complexes are negative in the precordial leads. In this ECG example of AIVR, note the right bundle ...

In a “normal” electrocardiogram (ECG), the transition of the QRS axis in the precordial leads occurs between leads V 3 and V 4 (i.e., there is a dominant S in V 3 and a dominant R in V 4).

Objective: Precordial ECGs ... the six limb leads can be derived from leads 1 and 2. The purpose of this study was to evaluate whether the 12-lead ECG could be substituted by ECG sets with a ...

The standard ECG has 12 leads. Six of the leads are considered “limb leads” because they are placed on the arms and/or legs of the individual. The other six leads are considered “precordial ...