On the third day of onset of acute myocardial infarction the enzyme elevated is HomeEnzymology MCQsOn the third day of onset of acute myocardial infarction the enzyme elevated is Q. On the third day of onset of acute myocardial infarction the enzyme elevated is A. Serum AST B. Serum CK C. Serum LDH D. Serum ALT Answer: Serum LDH