From a Paramedic, Bill Kelleher (tried to tag). I don’t personally know anything about this topic but I wanted to share:

I'm familiar with commotio cordis as a paramedic for over 32 years. I've been teaching for 30 of those years including topics like kinematics of trauma, anatomy and physiology, etc.

CC is exceedingly rare, with fewer than 30 cases per year in the US, almost exclusively in teens (mean age of 15), and almost exclusively in sports with a fast moving, relatively small projectil