Definitions for "ALT [Alanine transaminase"
found in serum and in various bodily tissues but is most commonly associated with the liver. Elevated levels of ALT oftensuggest the existence of other medical problems such as alcoholic or viral hepatitis, congestive heart failure, liver damage,biliary duct problems, infectious mononucleosis, or myopathy. For this reason, ALT is commonly used as a way of screening for liver problems.