We do APLS at Indiana. More accurately, we're in the process of doing it now. I had the same question until today when it was explained to us. Apparently ACEP and the AAP have taken the stance that the only people qualified to care for critically ill children are EPs and critical care peds folks, so they developed their own, "more etiology-based" program. I guess an analogy would be ACLS vs what you learn/do in EM and CC training.