The nurse is admitting a client who reports he has had chest pain, nausea, and vomiting off and on for the last 4 days. He decided to come to the hospital because he thought he had the flu
Which laboratory tests will provide information about acute cardiac damage for this client? 1. Troponin I and T
2. Red blood cells
3. CPK-MB
4. Homocysteine and platelets
Troponin I and T
Rationale: The levels of Troponin T begin to rise within 3 to 6 hours after myocardial injury and remain elevated for 14 to 21 days. Levels of Troponin I begin to increase in about 3 to 5 hours after myocardial ischemia and peak at 14 to 18 hours and remain elevated for 5 to 7 days. Red blood cells are unaffected by acute cardiac damage. The CK-II MB rises within 3 to 6 hours after the MI, peaks within 12 to 24 hours, and levels return to normal 2 to 3 days following the infarction. This client would most likely have normal valves 4 days out from the onset of symptoms. Homocysteine does not change with acute cardiac damage. Platelets are unaffected by acute cardiac damage.
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