An EKG strip represents the electrical signal that passes through the heart muscle preceding a
mechanical movement of the heart. On a 12 lead EKG, the heart is observed from 12 different angles.
After an EKG strip is obtained, a doctor will look for any deviation from the normal electrical activity
of the heart. Most significantly, a doctor will typically look for ST segment elevation, indicative of
myocardial infraction (also known as STEMI, or simply put, a heart attack).