Final answer:
High levels of CK-MB indicate a heart attack or myocardial infarction. Elevated levels of CK-MB can be detected through blood tests and are used to diagnose heart damage.
Step-by-step explanation:
High levels of CK-MB indicate a heart attack or myocardial infarction. CK-MB is an isoenzyme of creatine phosphokinase (CPK) that is released into the blood when there is damage to the heart muscle. Elevated levels of CK-MB can be detected through blood tests and are used to diagnose heart damage.