[FireBeyond]

As a tangential aside, reading the opening paragraph of this article reminded me - in the US, if you have cardiac arrest, you want to have it either the counties surrounding The Mayo Clinic in Minnesota or Puget Sound:

While cities like Detroit, Chicago and New York have less than 10%, down to 2% survival for /witnessed/, VF/VT (ventricular fibrillation / tachycardia, the rhythms an AED can shock) arrest (i.e. the "best" cardiac event to have), Rochester Minnesota, and the three counties of King, Pierce and Thurston (Seattle, Tacoma and Olympia) have above 40 to nearly 50% survival.

Learn CPR.

-- a paramedic