The nurse is caring for a client who is admitted to the CICU after experiencing a myocardial infarction. The cardiologist has ordered three troponin laboratory tests over a 12- to 16-hour time frame
How soon do troponin levels rise following the onset of pain? A) 1 to 2 hours
B) 2 to 3 hours
C) 3 to 4 hours
D) 4 to 5 hours
C
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Generally, two or three troponin laboratory tests are ordered over a 12- to 16-hour time frame. Troponin levels rise within 3 to 4 hours of the onset of chest pain, Troponin I and troponin T are specific cardiac markers for myocardial injury. Of the cardiac enzymes, troponin I returns to normal within 5 to 9 days and troponin T returns to normal in 10 to 14 days.
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