A plasma myoglobin result of 10 µg/L indicates what when the following measurements also fall within normal limits?

A plasma myoglobin result of 10 µg/L is considered within the normal range, particularly if other measurements, such as troponin levels and other markers of myocardial injury, are also normal. Myoglobin is a protein released into the bloodstream when muscle tissue is damaged, and elevated levels can indicate myocardial infarction or skeletal muscle damage. In the context of a low myoglobin level and normal additional tests, it strongly suggests that there is no significant muscle injury happening, either in the heart or skeletal muscles.

When interpreting these results, a plasma myoglobin level of 10 µg/L does not suggest active processes such as myocardial infarction, where one would expect elevated myoglobin levels due to substantial muscle damage. Likewise, conditions like stable angina would not typically present with such low myoglobin levels because they are not associated with significant muscle injury. Mild skeletal muscle damage would likely cause a transient increase in myoglobin that would exceed this level. Therefore, a result of 10 µg/L indicates no evidence of myocardial injury when viewed alongside normal results from other relevant tests.