Figure 4.

(A) Cardiac resynchronization therapy leads in the anteroposterior position X-ray imaging. (B) RAO 45 angle X-ray imaging displaying the original lateral vein mid-distal segment occlusion following left ventricular lead extraction (arrow). (C) LAO 45 angle X-ray imaging. Right ventricular double site pacing was selected due to original lateral vein occlusion. a, right atrial lead; b, one of the right ventricular leads; c, the remaining right ventricular lead; LAO, left anterior oblique; RAO, right anterior oblique.