I've never had a heart attack and sure hope to never have one.
But when you do have a heart attack you'll likely experience pain in the chest such as chest pain, chest tightening, numb arms etc.
Then if you do not get medical attention you can die soon after the heart attack.
Your heart does not always stop when you do have a heart attack but sometimes it does.
So if you think you may be having a heart attack you need to call 911 and get medical attention right away.
The sooner you get an ambulance on the way the better.
Call the ambulance before it gets too bad.
You can also crush up an aspirin or chew the aspirin when you think you're about to have a heart attack and the aspirin can stop the heart attack.
However you still need medical attention.
So always call 911 if you think you're having a heart attack.