system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Difference between a heart attack, cardiac arrest, and stroke?
gpt
Heart attack: blocked blood flow in heart, can kill parts of heart

Cardiac arrest: heart stopped, can be caused by many things - including above

Stroke: blocked blood flow in brain, can kill parts of brain

As heart feeds brain and brain controls heart, a failure in one can feed back into the other



Edit: coming back late, but so anyone reading this late as well isn't misled, as many commenters pointed out strokes can be caused by bleeds as well (hemorrhagic stroke) as opposed to an "obstacle" blocking the flow like a blood clot. The brain also doesn't have much *direct* influence on the heart. Check replies for more info.