Aspartate aminotransferase is an indicator of liver function and can also be used to assess whether a patient has myocardial damage. 1. Indicator for assessing liver function: aspartate aminotransferase, also known as glutamate aminotransferase, is mainly found in liver cells and cardiomyocytes, and is commonly used to determine whether liver function has been impaired. glutamate aminotransferase is mainly found in the mitochondria of the cells, and is released when there is severe damage to the liver cells. 2. To assess whether there is myocardial loss: when there is myocardial damage, it will also lead to mitochondrial damage, which will lead to a large amount of glutathione released into the blood, which can be seen in myocarditis, myocardial infarction and other problems. Clinically, high levels of GAT can be seen in physiological conditions such as sleep deprivation, excessive anxiety and stress, as well as in alcoholic liver, fatty liver, autoimmune hepatitis, chronic hepatitis, cirrhosis, and malignant tumors of the liver. Clinically, it is recommended to consult the gastroenterology department of a regular hospital if you find an elevated AST level.