Which cardiac enzyme is only found in cardiac cells and is indicative of an acute myocardial infarction when elevated?
  1. Troponin
  2. CK-MA
  3. CK
  4. Myoglobin
Explanation
Answer: A - Troponin is a protein found in cardiac cells and is used as an indicator of myocardial infarction. When it is elevated it is a positive indication some level of acute myocardial infarction.
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