In the univariate logistic regression analysis, PoAF was significantly correlated with hypertension (OR 0.570; 95% CI 0.328-0.991; P=0.046) and cardioplegia volume (OR 1.001; 95% CI 1.000-1.001; P=0.048), but did not correlate with age, ejection fraction, C-reactive protein (CRP), total CPB time and aortic cross-clamp time (Table 4). This evidence concerns the gene CRP and hypertensive disorder.