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Immunoassay reagents intended to perform qualitative and/or quantitative analyses on a body fluid sample (usually whole blood and/or urine) in a short period of time, typically several minutes, to determine myoglobin and oxygen-binding protein. The level of liberated myoglobin increases soon after the occurrence of heart damage (e.g., as the result of myocardial infarction) both in blood and in urine before the increase of creatine kinase activity, permitting its use as an early cardiac marker. Myoglobin levels also increase due to injuries in skeletal muscles and/or after vigorous physical exercise.
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