Prediction Of Af Recurrence After RFCA By Echocardiography And The Effect Of Different Ablation Ways On Recurrence Of AF

Objective: The cardiac structure and function of patients with recurrence of atrial fibrillation after radiofrequency catheter ablation(RFCA)were analyzed by echocardiography,and the recurrence factors were predicted,at the same time,the effect of different ablation procedures on the recurrence of atrial fibrillation was evaluated,which provided clinicians the imaging basis for the prevention and treatment of AF recurrence after RFCA.Methods: 16 patients with recurrence of atrial fibrillation after RFCA were treated as experimental group,37 cases of patients with no recurrence of atrial fibrillation after RFCA as control group,The experimental group and the control group were examined by echocardiographyThe experimental group and the control group were examined by echocardiography.At first,Left atrial anteroposterior diameter,left and right diameter,Left ventricular ejection fraction(LVEF),left atrial maximum and minimum volume(LAVmax,LAVmin),left atrial ejection fraction(LAEF),Left atrial global longitudinal,circumferential,radial strain(GLS,GCS,GRS)and its corresponding time-to-peak standard deviation()were measured by transthoracic echocardiography(TTE),to evaluate the structure and function of the left atrium.Secondly,the maximal and minimum volume(LAAVmax,LAAVmin),left atrial appendage ejection fraction(LAAEF)and left atrial appendage diameter were measured by transesophageal echocardiography(3D-TEE),to evaluate the structure and function of left atrial appendage in patients with atrial fibrillation.Then,analyzed different types of RFCA systematically to evaluate the effect of different ablation ways on the recurrence of atrial fibrillation.Finally,all data were analyzed statistically with t-test,2? test,and Logistic regression.Result: 1.The LA internal diameter(anteroposterior diameter,left and right diameter),left atrial volume(LAVmax,LAVmin)and TP-SD(LS)were significantly higher in the recurrence group than those in the no recurrence group after RFCA(P <0.05),while LAEF and GLS were smaller than those in the no recurrence group(P>0.05).2.The LAAVmin and LAA opening diameter in recurrence group were larger than those in the no recurrence group after RFCA(P <0.05),while the LAAEI was smaller than this in theno recurrence group(P>0.05).3.The recurrence rate of atrial fibrillation after RFCA was different in different types of ablation ways.The recurrence rate of atrial fibrillation after focal ablation was lower,and the recurrence rate of atrial fibrillation after combined ablation was higher than that of the other three(P<0.05).4.LAA opening diameter and GLS can be used as predictors of AF recurrence after RFCA(P <0.05),while LA left and right diameter,LAVmax,LAEF and TP-SD(LS)may be involved in AF recurrence,but not as AF recurrence Predictors(P> 0.05).Conclusion: 1.Atrial fibrillation is more likely to recur in parents with increased left atrial diameter and volume,decreased GLS,and poor left atrial motion synchronization after RFCA.2.Atrial fibrillation is more easily relapse in parents with increased left atrial appendage diameter and decreased ejection fraction after RFCA.3.The difference between the ablation ways may affect the recurrence after RFCA,patents with combined ablation is easier to relapse.4.Left atrial appendage diameter and GLS can be used as predictors of atrial fibrillation recurrence after RFCA.