A heart attack occurs most often as a result of coronary artery disease. Because of a buildup of plague in the artery, blood flow is blocked to one section of the heart. If left untreated, this can cause permanent damage. Heart attacks can be treated, and the most successful recovery occurs if treatment begins within an hour of the attack. There are also some warning signs you can recognize before an attack occurs. Learn more about how to spot a heart attack and improve your chances as well as what to do to help a victim.