gamma-glutamyl transpeptidase test
gamma-glutamyl transpeptidase (GGT) test,
a blood test that measures GGT and is used to detect liver cell dysfunction. It accurately indicates cholestasis, biliary obstruction, cholangitis, or cholecystitis. It can also detect chronic alcohol ingestion and therefore is useful in the screening or evaluation of patients with alcoholism. Levels of GGT are also elevated after acute myocardial infarction.