Heart-shaped fatty acid binding protein (H-FABP) is a small molecule (molecular weight of about 15KDa) soluble cellular lipoprotein, which exists in large amounts in myocardial tissue, and has significant specificity for the diagnosis of myocardial injury: high sensitivity and energy It can sensitively reflect the damage of cardiomyocytes, so it can assist in the diagnosis and early diagnosis of myocardial infarction and unstable angina. (for reference only)