Separation of strictly posterior infarction from anteriorly oriented QRS loop as "normal variation".
D000328:Adult; D003937:Diagnosis, Differential; D004562:Electrocardiography / Q000379:methods; D006801:Humans; D008875:Middle Aged; D009203:Myocardial Infarction / Q000175:diagnosis*; D014672:Vectorcardiography / Q000379:methods