Catheter ablation of the atrioventricular junction by radiofrequency energy delivered across the interventricular septum using a left sided approach.

We describe seven successful cases of ablation of the atrioventricular (AV) junction by passing radiofrequency (RF) energy between the tip of an electrode on the left ventricular aspect of the interventricular septum and a further electrode on the right side of the His bundle. All had undergone unsuccessful attempts at conventional unipolar RF ablation from the right and left side of the heart.