It is a deadly condition and many do not survive the attack. So the post I saw had preparations and countermeasures:
1. Cough self resuscitation: breathe and cough
'2. Have aspirin ready to remove clots. Aspirin can take effect soon
3. Make it easy for paramedics: post your conditions near phone, write your home address and unlock door.
4. Make your home easily identifiable by rescuers to save time. There is a very narrow window to survie a heart attack
5. Ingest nitroglycerin under the tongue to vasodilate blood vessel and remove the clots.
My daugther sa said it is not the post to watch before sleeping but I did. It is reality we must face.