Intermittently “Pre-Excited” ECG after Accessory Pathway Ablation: Unsuccessful Procedure or a Complication?
Figure 3
(a) The ventricular discharges with retrograde conduction over the AV node (second and third beats). (b) Early presystolic activity at the ablation site in the middle cardiac vein. Abl d, electrogram from the distal pair of the ablation catheter; Abl p, from the proximal pair.
