Fig. 4.

A patient with two manifest right sided accessory pathways was ablated using the ZF approach. Upper panel showed that the tricuspid valve was labeled with white dots and the site of the His bundle was labeled with yellow dots in RAO and LAO. The ablation catheter was placed at the first accessory pathway at about nine o’clock during tachycardia. Left lower panel showed the electrogram recording at the first target site. Right lower panel showed the second accessory pathway at 5 o’clock marked with red dot. Other abbreviations are as in Fig. 1