Cardiac Enzyme Studies

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

Why It Is Done

Cardiac enzyme studies are done to:

• Determine whether you are having a heart attack or a threatened heart attack (unstable angina) if you have chest pain, shortness of breath, nausea, sweating, and abnormal electrocardiography results.
• Check for injury to the heart after bypass surgery.
• Determine if a procedure, such as percutaneous coronary intervention (PCI), or a medicine to dissolve the blockage (thrombolytic medicine) has successfully restored blood flow through a blocked coronary artery.

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Author:	Douglas Dana Maria G. Essig, MS, ELS Robin Parks, MS	Last Updated: November 2, 2007
Medical Review:	Anne C. Poinier, MD - Internal Medicine E. Gregory Thompson, MD - Internal Medicine Stephen Fort, MD, MRCP, FRCPC - Interventional Cardiology
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