can I just throw in what may be a red herring.
a cardiac (heart) arrest (stoppage) isnt caused by "failure" of the heart. it is caused by a blood clot obstructing the blood supply and leading to death of the muscle tissue through oxygen starvation.
your blood (yeah you as well, you young smartarses) will clot for a number of reasons. one being stasis. if your blood stops moving in a vein the cascade of chemical reactions that leads to clotting can be initiated. sit still for a long period with a little more pressure in some part of the body (typically for pilots, the myth of sitting on your fat wallet :-) ) can cause stasis in a vein.
being a little dehydrated helps the clotting cascade on as well.
you young guys can be as smug as you like. in reality you have just as much opportunity to become a topic of ridicule on pprune as this guy has.
take care out there, it's the real world.
