A client arrives in the emergency room complaining of chest pain that began 4 hours ago. A troponin T blood specimen is obtained, and the results indicate a level of 0.6 ng/mL. The nurse determines that this result indicates:
a. A normal level.
b. A low value that indicates possible gastrilis.
c. A level that indicated a mycocardial.
d. A level that indicates the presence of possible angina.
Answer: c. A level that indicated a mycocardia because troponin is a regulatory protein found in striated muscle. The troponins function together in the contractile apparatus for striated muscle in skeletal muscle and in the myocardium. Increased amounts of troponins are released into the bloodstream when an infarction causes damage to the myocardium. A troponin T value that is higher than 0.1 to 0.2 ng/mL is consistent with a myocardial infarction. A normal troponin I level is lower than 0.6 ng/mL.