Figure 3.

The process of pacing lead implantation in real time of CARTO 3 mapping system. A, The depth and angle of the lead screwing into IVS can be seen in ICE. The measured ventricular septum thickness was 1.27 cm, the lead helix screw into the midlevel of ventricular septal with depth of 0.8 cm. B, AP view showed the ventricular septal model established by the ultrasonic catheter, which is located in the right ventricle. The lead located in the middle of the interventricular septum. Abbreviations: AP, anteroposterior; IVS, interventricular septum