Get answers to your heart disease prevention questions.
Lipoproteins are molecules made of proteins and fat. They carry cholesterol and similar substances through the blood.
A blood test can be done to measure a specific type of lipoprotein called lipoprotein-a, or Lp(a). Lp(a) is considered a risk factor for heart disease.
Blood is typically drawn from a vein, usually from the inside of the elbow or the back of the hand. The site is cleaned with germ-killing medicine (antiseptic). The health care provider wraps an elastic band around the upper arm to apply pressure to the area and make the vein swell with blood.
Next, the health care provider gently inserts a needle into the vein. The blood collects into an airtight vial or tube attached to the needle. The elastic band is removed from your arm.
Once the blood has been collected, the needle is removed, and the puncture site is covered to stop any bleeding.
You will be asked not to eat anything for 12 hours before the test.
Do not smoke before the test.
A needle is inserted to draw blood. You may feel moderate pain, or only a prick or stinging sensation. Afterward, there may be some throbbing.
High levels of lipoproteins can increase the risk of heart disease. The test is done to check your risk of atherosclerosis, stroke, and heart attack.
Mahley RW, Weisgraber KH, Bersot TP. Disorders of lipid metabolism. In: Kronenberg HM, Melmed S, Polonsky KS, Larsen PR, eds. Williams Textbook of Endocrinology. 11th ed. Philadelphia, Pa: Saunders Elsevier; 2008:chap 36.
Semenkovich CF. Disorders of lipid metabolism. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 217.
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