CHI3L1 and atherosclerosis: It shows that serum YKL-40 is involved in the occurrence of STEMI, which may be related to the secretion of YKL-40 by macrophages in atherosclerosis and the release of YKL-40 when the atherosclerotic plaque ruptures, suggesting that serum YKL-40 may predict the occurrence of STENI important indicators.