Category
Understand cardiac markers in your lab result
Learn how to read cardiac markers in your blood test result, what high or low flags can mean, and which related markers to check before talking to your doctor.
Reference ranges vary by lab. One result alone cannot diagnose a condition.
Don't guess from one marker alone.
Upload your full blood test PDF and see how these markers fit with the rest of your results, reference ranges and trends.
Educational only. LabTestly does not diagnose or replace your doctor.
- Troponin ICardiac Troponin I
Troponin I is a protein released by heart muscle cells when they are stressed or injured. It is interpreted very differently depending on the clinical setting — an urgent chest-pain evaluation, a follow-up after a known cardiac event, or a routine sensitive-assay screen all read troponin against different thresholds.
- BNPB-type Natriuretic Peptide
BNP (and its precursor NT-proBNP) is released by heart ventricles when they are under increased stretch or stress, such as from heart failure. It is a key diagnostic and monitoring marker for heart failure.
- CKCreatine Kinase
Creatine kinase (CK) is an enzyme found in muscle, heart, and brain tissue. It is released into the blood when these tissues are damaged, making it a marker of muscle injury.
- HomocysteinePlasma Homocysteine
Homocysteine is an amino acid produced during the breakdown of methionine. It is metabolised using vitamins B6, B12, and folate, so elevated levels can reflect deficiencies of these vitamins.