Univariate logistic analysis revealed that there was a significant association between CIN and the following: Killip class >1, reperfusion time, the prevalence of hypertension, glucose level on admission, peak creatine kinase MB, hs‐CRP on admission, the incidence of acidosis, LVEF, and Mehran risk score (all P<0.05, Table 2). This evidence concerns the gene CRP and Hypertension.