Why get tested?
To determine whether muscle, particularly heart muscle, has been injured; to detect high levels in the urine that can cause kidney damage after extensive muscle damage

When to get tested?
Every 2-3 hours for the first several hours after experiencing chest pain that is suspected to be due to a heart attack; when there has been severe traumatic injury to skeletal muscle

Sample required?
A blood sample drawn from a vein in the arm or a random urine sample