Abstract:Objective To study the predictive value of preoperative left atrial diameter and serum brain natriuretic peptide level in patients with atrial fibrillation after radiofrequency ablation. Methods From January 2017 to January 2018, 80 patients with atrial fibrillation were retrospectively analyzed. All patients were treated with radiofrequency ablation. Totally 76 healthy people were selected as control group during the same period. Left ventricular ejection fraction (LVEF), LAD, serum BNP, high-sensitivity C-reactive protein (hs-CRP) and angiotensin-converting enzyme (ACE) were compared between the two groups. AF-related factors were analyzed and subjects were established in the observation group. The operating characteristic (ROC) curve was used to analyze the predictive value of LAD and serum BNP for recurrence in AF patients. Results In the observation group, the incidence of chronic obstructive pulmonary disease, pulmonary hypertension, coronary atherosclerotic heart disease (hereinafter referred to as coronary heart disease) and hypertension was significantly higher than that of the control group (P?0.05). The serum hs-CRP, BNP, ACE levels and LAD of the observation group were significantly higher than those of the control group (P?0.05). Age, dilated cardiomyopathy, chronic obstructive pulmonary disease, pulmonary hypertension, coronary heart disease, hypertension, hs-CRP, BNP, ACE levels, and LAD were positively correlated with AF (P?0.05).LAD predicted the area under the ROC curve of AF recurrence to be 0.693, and the serum BNP level predicted the area under the ROC curve of AF recurrence was 0.690. Conclusions AF is associated with multiple factors. Recurrence after radiofrequency ablation in AF patients can be predicted by preoperative serum BNP levels and LAD.