Conclusion
RF can be delivered to deeper foci through a 3830-pacemaker lead with
maximum size lesion formation using proximal unipolar direct delivery
and proximal close bipolar as the return patch. In humans, it opens a
path to attain deep septal foci (LV summit) or epicardial structures
(vein of Marshall, transmural ablation from RF endocardial to LV
coronary sinus lead as return patch): using standard, 4F pacemaker
leads, and 2F small EP catheters or even isolated guidewires.
Keywords: Ablation, Deep foci, Ventricular Arrhythmia,
Radiofrequency, Pacemaker lead