Notably, we found that the ACEI/ARB(-) group had significantly higher levels of hs-CRP, pTNI, and pCK-MB and lower LVEF than the ACEI/ARB(+) group, indicating that the patients who did not use ACEI/ARB before the initial diagnosis of OCAD appeared to have higher levels of inflammation, larger myocardial infarction area, and poorer cardiac function. This evidence concerns the gene CRP and myocardial infarction.