Cardiac Enzyme Studies

Lactic Acid Dehydrogenase (LDH), CK (Creatine Kinase), CPK (Creatine Phosphokinase), Creatine Kinase (CK), Creatine Phosphokinase (CPK), Creatine Phosphokinase-MB Isoenzyme (CPK-MB), Heart Attack Enzymes, LDH-1 (Lactate Dehydrogenase Isoenzymes)

What Affects the Test

Reasons you may not be able to have the test or why the results may not be helpful include:

• Other diseases, such as muscular dystrophy, certain autoimmune diseases, and Reye's syndrome.
• Other heart conditions, such as myocarditis and some forms of cardiomyopathy.
• Emergency measures to treat heart problems, such as CPR, cardioversion, or defibrillation.
• Medicines, especially injections into muscles (IM injections).
• Cholesterol-lowering medicines (statins).
• Heavy alcohol use.
• Recent strenuous exercise.
• Kidney failure.
• Recent surgery or serious injury.

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Author:	Maria G. Essig, MS, ELS Robin Parks, MS	Last Updated: September 13, 2007
Medical Review:	E. Gregory Thompson, MD - Internal Medicine Stephen Fort, MD, MRCP, FRCPC - Interventional Cardiology
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