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Basics of Brain Tumors
A brain tumor starts when cells in the brain change and grow out of control. As they continue to grow, they form a mass of cells that becomes a tumor. Learn about the types of brain tumors and symptoms.
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The Clinical Cardiac Electrophysiologist
A clinical cardiac electrophysiologist, or cardiac EP, is a health care provider who treats rhythm problems of the heart. Learn more about their medical training, and the tests and procedures that they do.
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Carnitine Deficiency
Carnitine is a natural substance that the body uses to process fats and produce energy. Carnitine deficiency is when not enough of the nutrient carnitine is available to cells in the body. Read on for details about this condition.
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Antimyocardial Antibody
This test checks the level of a certain antibody in your blood that can indicate heart damage. The antibodies show up before symptoms appear.
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Anatomy and Function of the Electrical System
Detailed anatomical description of the heart's electrical system, including simple definitions and a labeled, full-color illustration.
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Male Pattern Baldness
Some men cope with their inevitable loss of hair by wearing a cap most of the time. Some don an artificial hairpiece to cover their loss. Still others shave their whole head. There's more to know about baldness than toupees, though. Learn more by taking this quiz.
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Health Library
How Much Do You Know About Anemia?
Anemia is a condition in which the body doesn’t have enough healthy red blood cells.
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Health Library
Addiction Quiz
Addiction to drugs or alcohol can happen to anyone of any age, social status, race, or income level. Find out more by taking this quiz.
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Health Library
Catecholamines (Urine)
This test measures the levels of catecholamines in your urine. The test may help find out if you have a rare type of tumor.
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