
LD isoenzymes are useful in diagnosis of pulmonary infarction and hepatic congestion as well as a late marker of myocardial injury.
Because of its location in organelles of the cytoplasm, LD escapes slowly from damaged myocardium. LD typically becomes elevated 24 hours after infarction, peaks in 3 days and returns to baseline within 8 to 9 days.
Analysis of LD2 and LD3 aids in differentiating pulmonary versus myocardial infarction. Increased LD5 is highly indicative of hepatic disease.
Helena Laboratories
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Keywords: electrophoresis, automation