AST is called glutamic aminotransferase and ALT becomes glutamic alanine aminotransferase, both with reference values of 0-40 U/L. More than 40 U/L and less than 80 U/L indicates high AST and ALT. Both enzymes are commonly elevated in liver disease and heart disease, and elevation often indicates pathological damage to organs. Liver diseases are common in fatty liver, chronic hepatitis B, drug-related hepatitis, autoimmune hepatitis, etc. Heart diseases often occur in myocarditis, myocardial infarction, but the magnitude of elevation is usually large, often accompanied by angina, palpitations, chest tightness and other symptoms. There are also some patients with strenuous exercise, high fever, congenital myotonic dystrophy, which also show different degrees of elevation of the two enzymes. Therefore, when elevated AST and ALT are found, the cause should be promptly identified at the hospital and actively treated.