Objective To analyze the risk factors of early heart failure after radiofrequency ablation of atrial fibrillation(AF),and to evaluate the relationship between functional mitral regurgitation(FMR)and early heart failure after radiofrequency ablation of AF.Methods A total of 257 patients who underwent AF radiofrequency ablation in our hospital from April 2018 to September 2022 were enrolled.According to whether acute heart failure occurred within 1 week after surgery,they were divided into non-early heart failure group(234 cases)and early heart failure group(23 cases).Clinical data such as preoperative serological indicators,echocardiography,radiofrequency ablation and postoperative follow-up of all patients were collected and grouped for comparison.Univariate and multivariate logistic regression analysis were used to evaluate the risk factors of early heart failure after radiofrequency ablation in patients with AF.Results The incidence of early heart failure was 8.9%(23/257).Age,stroke risk score for nonvalvular atrial fibrillation(CHA2DS2-VASc score),anticoagulant bleeding risk score(HAS BLED score),left atrium diameter and merger,proportion of patients with type 2 diabetes mellitus,moderate to severe FMR,persistent AF and PVI+linear ablation in heart failure group were higher than those in non-early heart failure group,creatinine clearance(GFR)was lower than that in non-early heart failure group(P<0.05).Multivariate logistic regression analysis showed that persistent AF,complicated with moderate to severe FMR and type 2 diabetes mellitus were independent risk factors for early heart failure in patients with AF after radiofrequency ablation(P<0.05).There were no significant differences in the rates of HF rehospitalization,AF recurrence,death and survival curves between the two groups(P>0.05).Conclusion There is a certain incidence of early heart failure after AF radiofrequency ablation,and moderate to severe FMR is an independent risk factor for early heart failure after AF radiofrequency ablation.