Figure 1 Continuous intraoperative endoscopic view of the ablation procedure. (A) Open the right-sided pericardial sac. (B) Blunt dissection of the oblique sinus (blue arrow). (C, D) Blunt dissection of the transverse sinus (white arrow). (E) Unveiling the tips of two navigators on the left side. (F) Left side ablation. (G, H) Right side ablation. IVC-Inferior vena cava; LA-Left atrium; LAA-Left atrial appendage; LSPV-Left superior pulmonary vein; PV-Pulmonary vein; RA-Right atrium; RSPV-Right superior pulmonary vein; SVC-Superior vena cava.