[url=http://www.630ched.com/news/news_local.cfm?cat=7428109912&rem=19725&red=80110923aPBIny&wids=410&gi=1&gm=news_local.cfm]http://www.630ched.com/news/news_local.cfm?cat=7428109912&rem=19725&red=80110923 aPBIny&wids=410&gi=1&gm=news_local.cfm[/url]

Much more likely just your run-of-the-mill cardiac arrest. The type only a defibrillator would fix.
CPR until defibirlator arrives. Shock as soon as you can if there is no pulse and it is a shockable rhythm.
AED's(automated external defibrillators) are great, and for the most part idiot proof. I reccomend learning where they are at public areas, just in case.