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High-Sensitivity Troponin I

Published: July 27, 2026Updated: August 25, 2026

High-sensitivity troponin I (hs-TnI) measures the concentration of cardiac troponin I in the blood, which is released during myocardial injury.

Quick summary

hs-TnI is a diagnostic biomarker for detecting myocardial injury.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 25, 2026Editorial policy

Key facts at a glance

Units
ng/L
Clinical utility
diagnostic
Result kind
quantitative
FDA-cleared
Abbott ARCHITECT hs-TnI, Siemens Atellica hs-TnI, Roche Elecsys hs-TnI, Ortho Clinical Diagnostics hs-TnI
interpretation: {"text":"Levels above the reference range (10–34 ng/L) may indicate myocardial injury, such as acute myocardial infarction or unstable angina.","label":"Elevated"}; {"text":"Levels within the reference range suggest no current myocardial injury, though clinical context is crucial for interpretation.","label":"Normal"}

High-sensitivity troponin I (hs-TnI) is a cardiac biomarker used to detect myocardial injury, particularly in the context of acute coronary syndromes (ACS). Its high sensitivity allows for the identification of even minor myocardial damage.

The reference range for hs-TnI is typically between 10–34 ng/L. Values above this range may indicate myocardial injury, such as in the case of a heart attack or other cardiac conditions.

Clinical interpretation of hs-TnI levels must consider the patient's clinical presentation, including symptoms, ECG findings, and other relevant diagnostic tests.

Frequently asked questions

What is the role of hs-TnI in diagnosing heart attacks?
hs-TnI is a key diagnostic tool for detecting myocardial injury, particularly in the early stages of a heart attack, due to its high sensitivity and specificity.
Can hs-TnI levels be elevated in conditions other than heart attacks?
Yes, elevated hs-TnI levels can also be seen in other conditions causing myocardial damage, such as heart failure, myocarditis, and pulmonary embolism.
  1. 1
    Thygesen K, et al. Fourth Universal Definition of Myocardial Infarction (2018).Source
  2. 2
    Apple FS, et al. High-Sensitivity Cardiac Troponin Assays: Guidelines for Clinical Use. (2012).Source

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy