The correlationanalyses of flora differences and age, inflammatory factors (CRP and Hcy), aswell as cardiovascular markers (High-sensitivity cardiac troponin (Hs-cTn), totalbile acid (TBA), brain natriuretic peptide (BNP) and left ventricular ejection fraction(LVEF)) were performed, so as to provide the basis for the role of intestinal flora inthe inflammatory response mechanism of AF. Here, CRP is linked to atrial fibrillation.