Radiofrequency ablation of atrial fibrillation combined with left atrial appendage closure can not only improve symptoms in patients with non-valvular atrial fibrillation, but also prevent left atrial appendage thrombosis. The safety and effectiveness of left atrial appendage occlusion have been confirmed by randomized controlled trials and actual experience. Among patients with different left atrial appendage emptying speeds, there are limited studies on the structure and function of the left atrial appendage after LAA closure. In this study, patients with persistent nonvalvular atrial fibrillation were selected for radiofrequency ablation combined with LAA closure. The sinus rhythm was restored after the operation. According to the different emptying speed of the left atrial appendage, they were divided into a high-flow rate group and a low-flow rate group. The differences in the structure and function of the left atrium between the two groups were analyzed.

Inclusion Criteria:

• Patients who received atrial fibrillation radiofrequency ablation combined with left atrial appendage closure.

Exclude Criteria

• Patients with incomplete data.
• Device embolism.
• Residual shunt around the device found by transesophageal echocardiography greater than 5 mm.
• Mitral valve stenosis.
• Artificial valve.
• Atrial septal defect.
• Dilated cardiomyopathy
• Moderate Severe mitral regurgitation

Patients with non-valvular atrial fibrillation between the ages of 18 and 80 received atrial fibrillation radiofrequency ablation combined with left atrial appendage occlusion, and recovered to sinus rhythm after the operation. According to the different left atrial appendage emptying speed, it is divided into a higher left atrial appendage emptying speed group and a lower left atrial appendage emptying speed group.