I have not had a heart attack but as a street medic for 15 years I have attended many.

Symptoms can vary all over the place. If you have one or more of the following, take two aspirins immediately and call 911.
- persistent pain in arm (usually right arm), back or jaw
- difficulty breathing
- sudden and persistent chest pain
- persistent dizziness and nausea

Don't try to be a hero. Us old guys have to be alert for symptoms. Death sucks.