Lab values
Normal Cardiac Lab Values
Adult reference ranges in US units with the SI equivalent. Ranges differ a little between labs; use your lab’s printed range.
| Test | US units | SI units | Notes |
|---|---|---|---|
| Troponin I | Below 0.04 ng/mL | Below 40 ng/L | High-sensitivity assays have their own cutoffs |
| BNP | Below 100 pg/mL | Below 100 ng/L | |
| Total cholesterol | Below 200 mg/dL | Below 5.2 mmol/L | |
| LDL | Below 100 mg/dL | Below 2.6 mmol/L | |
| HDL | Above 40 mg/dL (men), above 50 mg/dL (women) | Above 1.0 mmol/L (men), above 1.3 mmol/L (women) | |
| Triglycerides | Below 150 mg/dL | Below 1.7 mmol/L |
Study the labs
- ABG Interpretation in 6 StepspH, PaCO₂, HCO₃⁻, compensation, anion gap and oxygenation, with worked examples
- Electrolyte ImbalancesNa, K, Ca, Mg and phos: normals, ECG clues, safe replacement, hyperkalemia steps
- Pediatric Assessment and EmergenciesPAT, vital signs, airway infections, febrile seizures, dehydration, arrest, choking and abuse
- Bleeding, Reversal, HIT and DICAnticoagulant reversal, the 4Ts and HIT care, DIC and TTP for critical care exams
Other lab values
- Chemistry
- Hematology
- Coagulation
- Arterial blood gas
- Liver and pancreas
- Therapeutic drug levels
- Urine
- Pediatric vital signs by age
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Sources
- MedlinePlus Medical Encyclopedia ranges (National Library of Medicine, reviewed 2024–2026); ABIM laboratory reference ranges (January 2026) for hemoglobin, hematocrit and potassium; Merck Manual for ionized calcium; the heparin label for the aPTT target; ASHP/IDSA 2020 vancomycin guideline
For education and exam preparation only. Follow your institution’s protocols. Typical adult values for study. Follow the order, the label and your institution's protocols.