Exam Overview
Lactic acid dehydrogenase (LDH) is an enzyme that helps produce energy. It is present in almost all of the tissues in the body and becomes elevated in response to cell damage. LDH levels are measured from a sample of blood taken from a vein.
Why It Is Done
LDH levels help diagnose heart attack, lung disease, lymphoma, anemia, and liver disease. They also help determine how well chemotherapy is working during treatment for lymphoma.
What To Think About
Many diseases can cause elevations in LDH levels. Other tests are usually needed to confirm a diagnosis.
If heart attack is suspected, the LDH levels will be rechecked at 24 and 48 hours to monitor for changes.
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Credits
| Author | Robin Parks, MS |
| Editor | Kathleen M. Ariss, MS |
| Associate Editor | Tracy Landauer |
| Associate Editor | Pat Truman |
| Associate Editor | Terrina Vail |
| Primary Medical Reviewer | Caroline S. Rhoads, MD - Internal Medicine |
| Specialist Medical Reviewer | Douglas A. Stewart, MD - Medical Oncology |
| Last Updated | June 12, 2006 |
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