Laboratory tests are performed to identify damage to the heart muscle. Which test is elevated the earliest with heart damage?
a. Creatine phosphokinase-MB (CPK-MB)
b. Lactate dehydrogenase (LDH)
c. Lipid profile
d. Troponin
D
Troponin is elevated within 3 to 6 hours and is often measured in the emergency department. CPK-MB is elevated in 12 to 24 hours. Three serial samples are drawn. The LDH increases with heart damage within 3 to 6 days. The lipid profile is not elevated with heart damage.
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