Commotio Cordis

Arizona Little Leaguer killed after getting hit in chest by a pitch.

This is the textbook scenario for commotio cordis, and a perfect example of why all ballparks should have an AED, and all coaches, umpires, concession stand workers, groundskeepers and everybody and their friggin' brother-in-law should be trained in CPR and AED use.

I'm not saying an AED would have saved this kid, but it's likely the only thing that might have.