Elevated Levels
ALT and AST levels can become very elevated, in excess of 2,000 units per liter; normal levels are less than 250 U/L. Some
common causes of elevated ALT and AST levels include alcohol, cirrhosis, hepatitis, medications, toxins, ischemia, hemolysis, myopathy, hyperthyroidism and
even strenuous exercise. Elevated cardiac muscle enzyme levels can indicate cardiac damage and even provide evidence of a heart attack. High creatine phosphokinase levels indicate damage or tearing of skeletal muscle fibers. Normal creatine phosphokinase levels are between 60 and 400 U/L. Normal lactate dehydrogenase levels range from 140 to 280 U/L. Normal serum glutamic oxaloacetic transaminase levels are the same as AST.
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http://www.livestrong.com/article/51...#ixzz257ihOJLf