So if a heart stops you can massage, pump or shock it back to life, and surgeons even stop a heart on purpose before firing it back up, so why can’t they do that 100 percent of the time? What is it that makes a heart stop and never come back? If the brain is working then surely the heart should always come back?
In: Biology
Your heart needs oxygen. If something prevents oxygen getting to the heart (loss of blood, blocked artery etc.) then it runs out of oxygen and physically can’t beat anymore.
In theory you could sit there squeezing it to pump blood but the thing stopping your heart from getting oxygen is probably affecting the rest of your body’s ability to get oxygen as well.
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