Cardiac Markers and Serum Enzymes
- Creatine kinase (CK)
- Male: 38 – 174 U/L
- Female: 26 – 140 U/L
- Creatinine kinase isoenzymes
- CK-MM: 95% – 100% of total
- CK-MB: 0% – 5% of total
- CK-BB: 0%
- Myoglobin: 5–70 ng/mL
- Troponin:
- Troponin: Less than 0.04 ng/mL; above 0.40 ng/mL may indicate MI
- Troponin T: Greater than 0.1 to 0.2 ng/mL may indicate MI
- Troponin I: Less than 0.6 ng/mL; >1.5 ng/mL indicates myocardial infarction
- Atrial natriuretic peptide (ANP): 22 to 27 pg/mL
- Brain natriuretic peptide (BNP): less than 100 pg/mL
- C-type natriuretic peptide (CNP): reference range provided with results should be reviewed