A serum myoglobin test is used to measure the level of myoglobin in your blood.
Myoglobin is a protein that’s typically found in heart and skeletal muscle tissues. The only time that myoglobin is found in the bloodstream is when injury to a muscle has occurred. In particular, injury to the heart muscle results in the release of myoglobin. When detected through a blood test, the presence of myoglobin is clinically significant.