Which LD isoenzyme is most associated with viral hepatitis when elevated?

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Multiple Choice

Which LD isoenzyme is most associated with viral hepatitis when elevated?

Explanation:
Lactate dehydrogenase has several isoenzymes with different tissue distributions, and their patterns help indicate which organ is injured. LD5 is the isoenzyme most abundant in liver and skeletal muscle. When the liver is damaged, as in viral hepatitis, hepatocytes release LD5 into the bloodstream, so the LD5 level rises preferentially. This makes LD5 the best indicator among the isoenzymes for hepatic injury. The other isoenzymes are more associated with heart (LD1 and LD2) or lung (LD3), so they’re less specifically linked to viral hepatitis.

Lactate dehydrogenase has several isoenzymes with different tissue distributions, and their patterns help indicate which organ is injured. LD5 is the isoenzyme most abundant in liver and skeletal muscle. When the liver is damaged, as in viral hepatitis, hepatocytes release LD5 into the bloodstream, so the LD5 level rises preferentially. This makes LD5 the best indicator among the isoenzymes for hepatic injury. The other isoenzymes are more associated with heart (LD1 and LD2) or lung (LD3), so they’re less specifically linked to viral hepatitis.

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