I have a card in my wallet with the info (and also the Rx I take).
My first thought is, if I am out of it and need CPR or anything, I'm not real concerned about them damaging the actual band. (Due to port location, I think in a cpr situation it would likely get broken or dislodged).
But, any other instance, I figured they'd see it. They'd be doing some kind of scans on you if you're knocked out. And I'm with someone 90% of the time and everyone knows I have the band, so they'd tell.. or they could call my emergency contacts in my phone or however they find out that info, and they would tell them.

__________________