Figure 1.

The initial site of the lead and the relationship of the interventricular septum in ICE. A, Intracardiac ultrasonic section showed the left and right ventricles and IVS, the 315 sheath and the initial site of the lead (small white arrow). B, The RAO and AP view showed the IVS model established by the ultrasonic catheter, the position of the ultrasonic catheter, and ultrasonic section. The ultrasonic catheter is located in the right ventricle and the ultrasonic section points to the septum. Abbreviations: AO, aorta; AP, anteroposterior; IVS, interventricular septum; LV, left ventricle; MV, mitral valve; RAO, right anterior oblique; RV, right ventricle