Cardiac Troponin I, Quantitative (High-Sensitivity) with Guided Blood Draw
This test measures a protein released into your blood after heart muscle damage, helping doctors assess heart injury or risk of heart attack.
["High sensitivity helps detect even small heart damage, often used in emergency settings."]
Key facts at a glance
- LOINC
- 35893-7
- Short code
- CT Guided Brst Bx
- Synonyms
- CT Guided Brst Bx
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- ct
- 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 Matters for Your Health
Cardiac troponin I is a marker of heart muscle injury. High levels may indicate conditions like a heart attack, heart failure, or other cardiac stress. This test is especially useful in emergency situations to quickly identify heart problems that require urgent care.
How the Test Works
A small blood sample is taken from a vein, often in your arm. The lab uses a highly sensitive test to measure tiny amounts of troponin I in your blood. This method helps detect even small amounts of heart damage that might not be visible with standard tests.
When You Might Need This Test
Your doctor may order this test if you have symptoms like chest pain, shortness of breath, or if you’re at risk for heart problems, such as after a heart attack, heart surgery, or during heart failure. It’s also used in monitoring patients with known heart conditions.
What to Expect During the Test
The blood draw is quick and usually painless. You may feel a slight pinch, but it’s over fast. No special preparation is needed unless your doctor instructs otherwise. Results can help guide treatment decisions, including whether you need medication, monitoring, or further tests.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
hs-cTnI (High-Sensitivity Troponin I)
Frequently asked questions
What does a high troponin level mean?
What does a normal troponin level mean?
How long does it take to get results?
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