I was pleased to see the discussion of posterior MI come up on “Academic Life in Emergency Medicine”.

However, the topic of precordial ST depression is extremely complex, as outlined in this post on Posterior STEMI from 2009:

Pure (Isolated) Posterior STEMI: not so rare, but often ignored

And to truly appreciate ischemic ST depression, this post called “The Five Primary Patterns of Ischemic ST Depression, Without ST Elevation.  Some are STEMI-Equivalents” is worth your time.