Cardiolipin Antibody (Qualitative) – IgG Class
This test measures the presence of antibodies against cardiolipin, a lipid found in cell membranes, often used to evaluate for autoimmune conditions like lupus or other connective tissue disorders.
["This test helps assess potential autoimmune activity in your blood."]
Key facts at a glance
- LOINC
- 55444-4
- Short code
- Deprecated Cardiolipin IgA Ser
- Synonyms
- Deprecated Cardiolipin IgA Ser
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 82784
- 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
What Is Cardiolipin Antibody Testing For?
Cardiolipin antibodies are sometimes linked to autoimmune diseases, such as systemic lupus erythematosus (SLE) or antiphospholipid syndrome. They may also appear in conditions affecting blood clotting or inflammation. This test is not a routine screening but may be ordered if you have symptoms like unexplained blood clots, skin rashes, or joint pain.
How Is This Test Performed?
A small blood sample is drawn from a vein in your arm. The sample is then tested in a lab using an immunoassay method to detect cardiolipin antibodies. Results are reported as either positive or negative, indicating the presence or absence of these antibodies.
What Does a Positive Result Mean?
A positive result suggests the presence of cardiolipin antibodies, which may raise concerns for autoimmune conditions. However, this alone does not confirm a diagnosis. Further testing and clinical correlation with symptoms are needed to determine the cause.
What Are Common Symptoms Linked to Cardiolipin Antibodies?
Symptoms may include blood clots, recurrent miscarriages, skin rashes (like lupus butterfly rash), joint pain, or fatigue. If you experience these symptoms, discuss them with your healthcare provider, who may recommend additional testing or monitoring.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
Cardiolipin Antibody IgG (Qualitative)
Frequently asked questions
Why Might My Doctor Order This Test?
What Should I Expect Before or After the Test?
Are There Any Risks or Side Effects?
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