Heart attack also known as myocardial infarction is the death of heart muscle from sudden blockage of coronary artery by blood a clot.coronary arteries are blood vessels that supply the heart with blood and oxygen.Blockade of a coronary artery deprives the heart muscle of blood and oxygen causing injury to the heart muscle.Injury to the heart muscle cause chest pain and chest pressure sensation.if blood flow is not restore to the heart within 20-40minutes,irreversible death of the heart muscle begin to occur.muscle continue to die for six to eight hrs at which time the heart attack is usually complete.The dead heart muscle is replaced by scat tissue.For detailed manual on how to avoid heart attack and foods that prevent highblood pressure go to www.afroantics.com,click on health/wealth manuals and scroll down.Dr JERRY.