A patient reports chest pain, nausea, and vomiting off and on for the last 4 days, which the patient interpreted as the flu. What laboratory test(s) will provide information about acute cardiac damage for this patient?
1. troponin I and T
2. red blood cells
3. CK-MB
4. homocysteine and platelets
Correct Answer: 1
The levels of Troponin T begin to rise within 2?4 hours after myocardial injury and remain elevated 10?14 days. Levels of Troponin I begin to increase in about 2?4 hours after myocardial ischemia and peak at 24?36 hours and remain elevated for 7?10 days. Red blood cells are unaffected by acute cardiac damage. The CK-MB rises within 4?8 hours after the MI, peaks within 18?24 hours and levels return to normal 2?3 days following the infarction. This patient would most likely have normal values 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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