What is the relationship between enzyme lactate dehydrogenase and the diagnosis of myocardial infarction?

A LDH is decreased in myocardial infarction
B LDH is increased in myocardial infarction, indicating tissue damage ✓
C LDH has no role in diagnosing myocardial infarction
D LDH levels are unaffected by myocardial infarction

Explanation

Lactate dehydrogenase (LDH) is an enzyme found in many body tissues, including the heart. When the heart is damaged, as in a myocardial infarction, LDH is released into the blood, making it a useful marker for diagnosing heart attacks.

Source

Clinical Biochemistry textbooks
Enzymes in Disease Clinical Biochemistry Cardiac Enzymes Medium MEDICAL Confidence: high