Originally posted by Menelaus
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"Cardiac arrest" is when the heart stops beating (pumping) for any cause.
A "heart attack" is a problem with the heart itself (and can often lead to a cardiac arrest).
Virtually all deaths are from "cardiac arrest".
You could argue that in the case of respiratory failure, the brain might die of oxygen starvation before the heart actually stops, but from the paramedics/doctors point of view, they are treating a stopped heart by the time they get to him.

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