Theoretically a brain could countinue running without any issue in an external environment if given a blood supply. I've even seen these old Soviet dog experiments try to do that. So no, heart is definitely not the best way to determine if a person (who is really just a brain at the end of the day) is dead.
Nah, youre conscious and your heart is still beating.
What about sleep? Consciousness certainly wouldn’t define alive now would it?
Key part here is the heart is still beating. Kinda hard to sleep with a still heart…
Theoretically a brain could countinue running without any issue in an external environment if given a blood supply. I've even seen these old Soviet dog experiments try to do that. So no, heart is definitely not the best way to determine if a person (who is really just a brain at the end of the day) is dead.