Try 12-lead electrocardiography for ACLS providers by D Bruce Foster.
"There is nothing more difficult to take in hand, more perilous to conduct, nor uncertain in its success, than to take the lead in the introduction of a new order of things, for the innovator has for enemies all of those who have done well under the old, and lukewarm defenders in all of those who may do well under the new." - Machiavelli
