A posterior ECG is done by simply adding three extra precordial leads wrapping around the left chest wall toward the back. Below are some examples including isolated posterior MIs, inferior STEMIs ...

in women in leads V2-V3 and/or of ≥ 1 mm (0.1 mV) in other contiguous chest leads or the limb leads.” This means 1 millimeter in any two contiguous leads, except leads V2 or V3, where the ...