The Physician Has Ordered Determination of CK-MB and Troponin Levels

question 37

Multiple Choice

The physician has ordered determination of CK-MB and troponin levels for a patient who has experienced chest pain and aching for the last 4 days.What does the nurse expect on reading this order?

• A) Myoglobin levels will also have to be determined to confirm myocardial damage.
• B) CK-MB enzyme levels will be the most reliable indicator of any myocardial necrosis that has occurred.
• C) Any serum cardiac marker will be inconclusive in determining myocardial injury that is several days old.
• D) The presence of myocardial damage occurring several days earlier can be validated best by the troponin level determination.

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