aminotransferase (ALT) test measures the amount of this enzyme in
aminotransferase) normal range is 5 U/L to 45 U/L . U/L =Units per
is an enzyme that is produced in the liver cells (hepatocytes) therefore
it is more specific for liver disease than some of the other enzymes
. It is generally increased in situations where there is damage to
the liver cell membranes. All types of liver inflammation can cause
inflammation can be caused by fatty infiltration (see fatty liver)
some drugs/medications, alcohol, liver and bile duct disease.
liver is the collection of excessive amounts of fat inside liver cells,
also called steatosis hepatitis.
important avoid strenuous exercise just before having an ALT test.
high levels of ALT may be caused by:
or severe liver damage, such as viral hepatitis.
Exposure to carbon tetrachloride.
Decay of a large tumor (necrosis).
or moderately high ALT levels may be caused by:
Hepatitis. The ALT level in a person with hepatitis can be 20 times
the normal value.
Alcohol dependence. People who drink excessive amounts of alcohol
and take acetaminophen (such as Tylenol) can have high ALT blood levels.
Mildly elevated levels of ALT may occur in people who are growing
quickly, especially young children.
high levels ALT levels may be caused by:
A heart attack.
Injury to the pancreas, kidneys, or muscles.
Many medicines, such as antibiotics, chemotherapy, aspirin, narcotics,
>60 IU were associated with a significantly increased prevalence
of antibody to hepatitis B surface antigen (anti-HB8) and antibody
to hepatitis B core antigen (anti-HBC) occurring together.
you may not be able to have the test or why the results may not be
medicines. Talk with your health professional about all the prescription
and nonprescription medicines you are taking. You may be instructed
to stop taking your medicines for several days before the test.
some herbs and natural products, such as echinacea and valerian.
Strenuous exercise, injury to a muscle, or injections into a muscle.
Recent cardiac catheterization or surgery.
test detects liver injury. ALT values are usually compared to the
levels of other enzymes, such as alkaline phosphatase (ALP) and aspartate
aminotransferase (AST), to help determine which form of liver disease
high levels of ALT (more than 10 times the highest normal level) are
usually due to acute hepatitis, often due to a virus infection. In
acute hepatitis, ALT levels usually stay high for about 12 months,
but can take as long as 36 months to come back to normal.
exercise can cause a mild elevation like yours in ALT.