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Anticardiolipin Antibodies (ACA) Blood Test, Quantitative, IgG and IgM

An ACA Test includes Anticardiolipin antibodies, IgG, quantitative; anticardiolipin antibodies, IgM, quantitative.

Sample Report

Test Code: 161802

Also Known As: ACA, Antiphospholipids, Cardiolipin Antibodies

Methodology: Enzyme-linked immunosorbent assay (ELISA) detecting isotype-specific ACA binding to a microtiter plate coated with purified cardiolipin antigen

Preparation: No special preparation required.

Test Results: 1-2 days. May take longer based on weather, holiday or lab delays.


The Anticardiolipin Antibodies Test, or ACA Blood Test, aids in the diagnosis of antiphospholipid syndrome (APS). APS is an autoimmune disorder that produces anticardiolipin antibodies. These antibodies interfere with the blood clotting process, which can result in inappropriate or excessive clotting. The presence of anticardiolipin antibodies increases a person’s risk of developing recurrent blood clots in the veins and arteries, with complications ranging from mild to life-threatening. APS is also associated with thrombocytopenia (low blood platelet count) and pregnancy-related conditions such as preeclampsia, premature labor and recurrent miscarriages.

The presence of anticardiolipin antibodies does not necessarily indicate APS. Low levels of these antibodies may be present in those with HIV, certain types of cancer and infections, the elderly, and individuals on drugs such as phenothiazines and procainamide. Healthy individuals may also test positive for anticardiolipin antibodies. Given the transient nature of antibodies in some of these situations, patients who test positive should be retested six to eight weeks following the initial test. A diagnosis of APS can be made only on repeated positive test results.

The ACA Blood Test includes anticardiolipin antibodies, IgG, quantitative, and anticardiolipin antibodies, IgM, quantitative. This test also goes by the following names: Anticardiolipin Antibodies, ACA, Antiphospholipids and Cardiolipin Antibodies. Fasting is not required to prepare for this test, and results will be delivered within one to two days. Insurance and a doctor’s order are not required to purchase this test.


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