Cardiac Troponin I (High-Sensitivity) with 24-Hour Time-to-Maximum Concentration Analysis
This test measures a protein released by heart muscle when it’s damaged, often used to check for heart attack or other heart issues. The 24-hour analysis helps doctors understand how quickly your body responds to injury.
["Helps detect heart damage and assesses how quickly your heart tissue heals after injury."]
Key facts at a glance
- LOINC
- 80993-9
- Short code
- Dt+tm 1st balloon infl Hrt Cardiac Cath
- Synonyms
- Dt+tm 1st balloon infl Hrt Cardiac Cath
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 1.5
- Ref high
- 9
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- cardiac-catheterization
- CPT
- 83002
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why This Test Is Done
Doctors may order this test if you’ve had chest pain, shortness of breath, or other symptoms that could signal a heart problem. It’s also used after a heart attack to monitor recovery or in people with risk factors for heart disease.
What to Expect Before the Test
You’ll likely have a small needle inserted into your arm or hand to draw blood. No special preparation is needed, but tell your doctor about any medications or recent injuries to your heart.
How the Results Are Used
Results help doctors determine if your heart has been damaged, how severe it is, and whether treatment is needed. High levels may mean recent heart stress or injury, while stable or low levels suggest no active damage.
Common Causes of Abnormal Results
Elevated troponin levels can occur after a heart attack, severe heart failure, or conditions like heart valve problems or heart muscle inflammation. False elevations can happen with extreme exercise or kidney problems, so doctors consider other factors.
Reference range
Follicular: 1.5-9.0 mIU/mLN/A
For females: inform if menstrual cycle status. For certain tests, timing within menstrual cycle may matter.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
This test is critical for diagnosing heart attacks, assessing acute coronary syndrome, and guiding treatment decisions. High-sensitivity testing improves early detection of even mild heart damage, allowing for timely interventions to reduce long-term risks.
Short name
hs-cTnI 24h Tmax
Frequently asked questions
Will this test hurt?
How long will I have to wait for results?
Can I eat or drink before this test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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 16, 2026. · Read our editorial policy