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Cardiac Biomarker Panel: Cardiac Troponin I and Myoglobin (Serum)

Published: August 9, 2026Updated: August 16, 2026

This test measures two proteins released when your heart muscle is damaged. It helps doctors check for heart attack or other heart-related issues.

Quick summary

["This test helps identify heart problems by detecting damage to heart tissue."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
7179-5
Short code
CAROBIGE
Synonyms
Carob IgE Qn
Category
chemistry
Sample
serum
Container
Serum separator tube (SST) or red-top tube
Units
N/A
Ref low
0.35
Ref high
0.7
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
Immunoassay (Fluorescent Enzyme Immunoassay / ImmunoCAP FEIA)
CPT
86003
SNOMED
395141000119106
Specimen volume
0.5-1 mL serum
Stability
Room temperature: 7 days; Refrigerated (2-8°C): 14 days; Frozen (-20°C or below): 30 days. Avoid repeated freeze-thaw cycles.
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
24–72 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 irregular heartbeat. It’s also used after heart surgery, during heart attacks, or if you have risk factors like high blood pressure or diabetes.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm to draw blood. If you’re on blood thinners, let your doctor know before the test.

What the Test Results Mean

Elevated levels of these biomarkers can indicate heart damage, but results depend on your symptoms and medical history. Your doctor will interpret the results in the context of your overall health.

Common Causes of Abnormal Results

High levels may be caused by heart attacks, heart muscle inflammation, or other heart conditions. Other factors like muscle injuries or infections can also affect these biomarkers.

Reference range

Negative: <0.35 kU/L; Equivocal: 0.35-0.70 kU/L; Positive: >0.70 kU/L. Reference values may vary by laboratory and assay manufacturer.N/A

Specimen: serum

No special preparation required. Patient should inform provider of all medications, as antihistamines do not need to be discontinued for IgE testing.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Cardiac Biomarker Panel

Frequently asked questions

How long does it take to get my results?
Results are typically available within 24 to 48 hours, depending on your lab’s processing time. Follow-up with your doctor to discuss the findings.
Can I eat or drink before this test?
You can eat and drink normally unless your doctor specifies otherwise. No fasting is required for this blood test.
Will I feel any pain or discomfort?
You may feel a slight pinch or discomfort when the needle is inserted, but it usually goes away quickly. Most people don’t experience lasting pain.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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 16, 2026. · Read our editorial policy