Fig. 2.

The ablation points. The X-ray image of the right pulmonary vein in the anteroposterior and left anterior oblique views (A); the X-ray image of the right atrial (RA) isthmus in the right anterior and left anterior oblique views (B); the 3D CT image of the aorta, spine and LA (C); and the ablation points in the 3D CT image (D). (A) To clarify the position of the right pulmonary vein, this fluoroscopy image shows the ring catheters located in the right pulmonary vein. (B) The RA was positioned in clockwise rotation. The start position of the RA ablation catheter is shown in this figure. (C) The 3D CT shows the anatomical relationship between the aorta, spine, and LA. (D) The dots are ablation points. To make the ablation points visible, the aorta was erased.