Troponin I or T (cTnI)
Proteins released from damaged heart muscle. The most sensitive and specific markers of heart attack.
Typical normal range
< 0.04 (cTnI) · < 0.01 (cTnT) ng/mL
If high ↑
URGENT: Heart attack, myocarditis, pulmonary embolism, heart failure
If low ↓
Normal — no acute cardiac injury
What is a normal Troponin I or T level?
A typical reference range is < 0.04 (cTnI) · < 0.01 (cTnT) ng/mL. Ranges vary between laboratories and can depend on age and sex, so compare your result with the range printed on your own report.
What does a high Troponin I or T level mean?
URGENT: Heart attack, myocarditis, pulmonary embolism, heart failure. A single result rarely gives a diagnosis on its own; your doctor will interpret it alongside your symptoms and other tests.
What does a low Troponin I or T level mean?
Normal — no acute cardiac injury. Your doctor will interpret it alongside your symptoms and other tests.
About the Inflammation & Cardiac
Inflammation markers rise when the body is fighting infection, injury or long-term inflammation. Cardiac markers are released when the heart is strained or damaged, and help doctors assess heart conditions.
See your own Troponin I or T result explained
Upload your blood test PDF or a photo. AI Lab Result reads every marker, flags anything outside your lab’s range, and explains it in plain English. Free to start.
Analyze my results freeRelated markers in the Inflammation & Cardiac
Medical disclaimer: Reference ranges vary by laboratory, age, sex, and clinical context. This page is for educational purposes only and is not a diagnosis. Always discuss your results with a qualified healthcare professional.