Final answer:
Creatine Kinase, also known as CPK, is an enzyme that catalyzes the conversion of creatine to creatine phosphate. It is used as a marker enzyme for the diagnosis of myocardial infarction or heart attack.
Step-by-step explanation:
Creatine Kinase, serum (at 30 ° C) ambulatory: Creatine Kinase, also known as CPK, is an enzyme that catalyzes the conversion of creatine to creatine phosphate, a high energy compound that works to supply energy during muscle contraction. CPK is present in tissues such as the cardiac muscle, skeletal muscle, and the brain. It is used as a marker enzyme for the diagnosis of myocardial infarction or heart attack, as its concentration increases in the blood plasma following a heart attack.