Figure 1. Measurement of LAR by TEE at 45°/90° planes. Figure A-D demonstrates the location of LAR (red arrow ) and gauge of LAR width and thickness (red dashed line ) at 45/90° plane. LAR width was measured as the maximum length of high-echo band between LAA side and LSPV side of LAR, while LAR thickness was measured from the free-end to the base where a distinct drop of signal was observed.Figure A/B and C/D shows preprocedural and postprocedural measurement of LAR respectively. LAA denotes left atrial appendage, LSPV left superior pulmonary vein, W for width, WM Watchman device.