So fast they’d not even be able to register what was happening. Not a bad way to go.
No joke, I was in the hospital with a heart attack back in January, waiting on my stent.
Woke up at 6 AM and was fiddling on my phone such as you do. Nurse comes in:
“Were you asleep about an hour ago?”
“Yeah, why?”
“Your heart stopped for 8 seconds.”
“Um… thank you? I’m not sure what to do with that information…”
I never really got the “heart stop = dead” thing like yes, if you’re heart stops you’re going to die, but even when someone is beheaded, they are still conscious enough for a few seconds to blink their eyes in response to questions. It’s when the electrical signals in your brain stop that you’re actually dead, not your heart.