Lactate dehydrogenase ( LDH) is a nonspecific enzyme found in most organs. Highest concentrations are found in liver, heart, kidney and blood cells. LDH measurements are used in the diagnosis and treatments of liver diseases like Acute viral hepatitis, Cirrhosis & Metastatic carcinoma; Cardiac diseases like Myocardial infarction; Tumors of lungs / kidneys & Hematologic disorders like Megaloblastic anemia & Hemolytic anemia.