@neckromancer
true...true...however...
you're alone, you suffer a heart attack. either you...
do nothing: death most likely awaits, unless you're lucky enough that someone will spot you squirming on the ground. but since you're alone, most likely you'll be dead before that happens
or
do something (not necessarily the one mentioned here): may or may not save you depending on what you do, and you know what you're doing and throw in some luck (since not all measures, even though widely acknowledged, always work).
do everything you can to save your neck, ika nga. better kung tama ginagawa mo.