Does this test have other names?
Cholesterol Lp(a), Lp(a)
What is this test?
This test measures the level of lipoprotein (a), or Lp(a), in your blood.
Lipoproteins are made of protein and fat. They carry cholesterol through your blood.
Lp(a) is a type of low-density lipoprotein, or LDL ("bad") cholesterol. High levels
of Lp(a) can create plaque. This is a buildup of cholesterol that limits blood flow
through your arteries. A high level of Lp(a) can be a sign of cholesterol-related
disease, such as coronary artery disease. Research has found it to be an independent
risk factor for heart disease. How that information can be used in routine medicine
isn't yet well defined.
Why do I need this test?
You may have this test if you have symptoms of heart disease, if you have a family
history of cardiovascular disease, or if you have heart disease even though you have
a normal lipid level. You can inherit abnormal levels of Lp(a).
What other tests might I have along with this test?
Your healthcare provider may order other tests to look at how well your heart is working.
These tests may include:
Complete lipid or cholesterol profile
Electrocardiogram, or ECG, to measure heart activity
Stress test to check your heart while you are exercising
Echocardiogram to show an image of your heart while it's beating
Cardiac catheterization to see if you have a clogged artery
What do my test results mean?
Many things may affect your lab test results. These include the method each lab uses
to do the test. Even if your test results are different from the normal value, you
may not have a problem. To learn what the results mean for you, talk with your healthcare
Results are given in milligrams per deciliter (mg/dL). In most people, Lp(a) levels
do not change much over their lifetime. Levels tend to be higher in women after menopause
and tend to be slightly lower in men than women. Lp(a) levels may also vary with ethnicity.
For example, African-Americans often have higher levels of the protein than whites.
For most people, higher results mean greater than 30 mg/dL. If your results are high,
it may mean you have high cholesterol and cardiovascular disease.
How is this test done?
The test requires a blood sample, which is drawn through a needle from a vein in your
Does this test pose any risks?
Taking a blood sample with a needle carries risks that include bleeding, infection,
bruising, or feeling dizzy. When the needle pricks your arm, you may feel a slight
stinging sensation or pain. Afterward, the site may be slightly sore.
What might affect my test results?
Other factors aren't likely to affect your results.
How do I get ready for this test?
You don't need to prepare for this test. But be sure your healthcare provider knows
about all medicines, herbs, vitamins, and supplements you are taking. This includes
medicines that don't need a prescription and any illicit drugs you may use.