Effect of Left Atrial Appendage Velocity on Left Atrial Structure and Function After Radiofrequency Ablation Combined With Left Atrial Appendage Occlusion
Effect of Left Atrial Appendage Velocity on Left Atrial Structure and Function After Radiofrequency Ablation Combined With Left Atrial Appendage Occlusion
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