Cardiac Troponin I (Serum) by Electrophoresis
This test measures a protein released by heart muscle when it is damaged, often seen in heart attacks or other heart conditions.
["Troponin I helps doctors assess heart injury or damage."]
Key facts at a glance
- LOINC
- 2154-3
- Short code
- CK MB SerPl Elph-cCnc
- Synonyms
- CK MB SerPl Elph-cCnc
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 22
- Ref high
- 198
- Critical range
- — – 10000 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- electrophoresis
- CPT
- 82553
- 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
Your doctor may order this test if you have symptoms like chest pain, shortness of breath, or other signs of heart problems. It can also be used to monitor heart health after a diagnosis like a heart attack or heart surgery.
What to Expect Before the Test
No special preparation is needed. You’ll typically have a blood sample drawn from a vein in your arm. If you’re on blood thinners, let your doctor know before the test.
What the Results Mean
Elevated levels of troponin I can indicate heart muscle damage, which may be caused by conditions like a heart attack, severe heart strain, or other heart-related issues. Normal levels suggest no significant heart damage at that time.
Common Causes of Abnormal Results
High troponin I levels can occur due to heart attacks, heart failure, heart valve problems, or other conditions that stress the heart. Other factors, like severe muscle injury or certain infections, may also lead to elevated levels.
Reference range
Adult males: 22-198 U/L; Females: 22-198 U/LN/A
No special preparation required. Inform provider of any chest pain or symptoms.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
Cardiac Troponin I (Serum)
Frequently asked questions
How long does it take for troponin levels to return to normal after a heart attack?
Can troponin levels be affected by other health conditions besides heart problems?
Why might my doctor order this test even if I don’t have obvious heart symptoms?
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 17, 2026. · Read our editorial policy