Below-normal values of myoglobin generally do not represent special clinical significance and do not require undue concern.
The normal value of serum myoglobin ranges from 10 to 80 μg/L, with slight variations in the kits used in different hospitals and testing centers, which may have slight variations. Myoglobin is only found in cardiac muscle and skeletal muscle. Under normal circumstances, myoglobin in the blood is minimal, so myoglobin below the normal value does not represent a special clinical significance.
On the contrary, if myoglobin is higher than normal, it may indicate that there is some tissue damage in the body, causing myoglobin to be released from the damaged cells, which in turn may indicate an elevated value by blood tests. This can be seen in cases of acute myocardial infarction, myocardial injury, myotonic dystrophy, and progressive myasthenia gravis.
In the event of abnormal myoglobin values, especially if they are higher than normal, it is advisable to consult a doctor as soon as possible.