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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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In all of the following conditions Troponin-T is preferable to CPK-MB in the diagnosis of acute myocardial infarction (MI) except in diagnosing:
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The correct answer is  Troponin-T levels remain elevated for 10 days following myocardial infarction so it cannot be used to assess reinfarction 4 days after an acute MI. The amino acid sequence of cardiac-specific troponin I and T are different from skeletal muscle forms of these proteins. It is the preferred biochemical marker for myocardial infarction. It is useful in diagnosing small infarcts and to distinguish unstable angina from NSTEMI. Levels of cTnI and cTnT remain elevated for 7-10 days following STEMI. Ref: Harrison's Internal Medicine, 18th Edition, Chapter 245