Don't know from experience. Some who have survived major heart attacks have described it as intense pain like someone is squeezing your heart. It depends on how quickly you pass out.
When I was sleeping today, I had a bad heart pain as if it was being squeezed. Even though I wasn't having any kind of heart attack, it was still very painful. So you would assure that heart attack would be a lot more painful than that? I jumped of the bed, anyway. Now I am awake and it is 5:38 am.
Doctors always say I am too healthy but I dont believe that I am that healthy. I cannot sleep on my left. My heat gets squeezed and it hurts a lot. When I went to doctor, doctor said there was nothing.
Guess what? My grandfather was going to heart doctor and heart doctor was telling him that his heart is in a perfect health, perfect, perfect. Then he got heart attack and he died about 2 months after his heart attack. Are these doctors a joke or what?
as with nearly all things physiological, your mileage will vary. not all strokes are accompanied by major pain, and i would imaging it might even be possible to die from one in your sleep without being awakened by it. (no idea what the odds of that are though. i'm guessing not entirely favorable.) ask me in a few more years, maybe a decade or so, if you can find my spirit. just don't expect it to hang around anywhere near this earth for you to do so.
the body is a whole diverse ecology inside, not something as simple or linear even as the most complex mechanical device. diagnosis is probability, nothing is infallable.
How painful is it to die from a heart attack? To be honest with you, no one has ever lived to tell, It's sort of implied in the "die" part of the question) Otherwise themax has it pretty spot on some heart attacks are painful and some are not. and you can die from a heart attack suddenly even if you are in perfect health.
in truth everyone will die of a heart attack, a heart attack is when the heart stops beating and since death is defined as the moment the heart stops you can see that technically we all will, and do die of a heart attack, it's just the event that causes the heart to stop beating that varies. Incidentally you are not the only one to experience pain if you sleep on your left side, I get it too. Apparently there is a known reason for this but sleeping on your left side with your arm underneath you will cause pain, as will sleeping with the arm raised above you, like when it's up by your head, this is due to the muscles in the shoulder and the left side of the chest being under tension.