Heart Attack (also called an acute myocardial infarction or AMI) happens when the arteries leading to the heart become blocked and the blood supply is slowed or stopped. When the heart muscle is unable to get the oxygen and nutrients it needs to function properly, the heart tissue that is affected may die. AMI is the leading cause of death in the United States.
One way to evaluate the care of patients diagnosed with AMI is to look at the percentage of patients receiving all of the treatments (also known as "indicators") appropriate to their situation. The goal for all medical facilities should be to provide to all applicable patients each of these indicators 100% of the time.