A nurse in the emergency department is caring for a client who is experiencing manifestations of a myocardial infarction (MI). Which of the following laboratory tests should the nurse expect the provider to prescribe?

A. Troponin Troponin is the most specific and sensitive marker for myocardial injury. Levels rise within 3–6 hours of an MI. B. C-reactive protein CRP indicates inflammation and is nonspecific. It is not diagnostic for acute MI. C. Brain natriuretic peptide (BNP) BNP is used to evaluate heart failure, not primarily to diagnose MI. D. Creatinine kinase (CK) CK is a general marker of muscle injury; CK-MB is more specific for cardiac damage but is less accurate than troponin.