Lipoprotein(a) (also called Lp(a) or LPA) is a lipoprotein subclass. Genetic studies have identified Lp(a) as a risk factor for atherosclerotic diseases such as coronary heart disease and stroke.
The Lp(a) test is typically ordered by a doctor if you have other risk factors for heart disease. Results of this test help determine your risk. Increased amounts of Lp(a) in the body are associated with inflammation in the walls of the arteries. This can lead to changes in the blood vessels, including atherosclerosis. This is a hardening of the arteries.