new_n_lost
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A 60 year old man with chest pain has both Troponins and CK measured. Which of these is true regarding troponins in acute coronary syndrome?
A. Troponin I is detectable 4 weeks after an MI
B. Troponins are elevated in atrial fibrillation
C. Troponin is no more useful than CKMB
D. Troponin I is specific for cardiac disease
E. Myocardial infarction is unlikely if a 12 hour troponin is not raised
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| mms
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Troponin I is specific for cardiac muscle and rises in case of myocardial necrosis at about the same time as CKMB (within2-4 h of the MI and peaks at 24h) but it stay elevated for 4-7 days (CKMB down to normal in 72h).
I tink the answer is E
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| chemamr
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E?
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| usmle4me
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E
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| new_n_lost
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| new_n_lost
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Answer: E) Myocardial infarction is unlikely if a 12 hour troponin is not raised. Troponins are more specific cardiac markers than CKMB. However, they can be raised in situations such as myocarditis, pulmonary emboli and renal failure. They usually stay detectable for up to 2 weeks after an MI.
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| kamran865
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MR LOST kindly explain,if correct ans is E, how, does troponin does not rises in first 12 hours in MI
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