LDH stands for lactic acid dehydrogenase. This compound is an enzyme found within the tissues and cells of the body. Its levels rise when cellular damage occurs.
Lactic acid dehydrogenase is present throughout the body and provides energy for humans. This enzyme's levels can be measured through simple blood tests. Doctors may order a blood test to determine a patient's lactic acid dehydrogenase levels in order to help diagnose several conditions, such as lung disease, anemia, liver disease or lymphoma. The levels of the enzyme may also be helpful in determining how well chemotherapy works in patients with certain types of cancer.