Chronic obstructive pulmonary disease (COPD) was morecommon in patients with POAF (11.5% vs. 37.5%;P=0.024), whereas the frequency of hypertension (HT),diabetes mellitus, smoking, and previous coronary artery disease did not differ.C-reactive protein and cholesterol levels were similar between the two groups.Left atrial diameter (LAD) was greater in patients with POAF (35.9±1.6vs. 36.7±1.7 P<0.039). This evidence concerns the gene CRP and hematocrit.