The heart beating is not a good definition of being alive in my opinion. The heart stopping temporarily doesn’t mean you died, you were just in terribly grave danger.
If a person is defined by their heart, what does that make a heart transplant?
utterly useless definition.
I meant like, when someones heart stops and gets restarted again with cpr or a defibrillator or something. People often call that being dead, and coming back.