Figure Legends
Figure 1. Left hand panel. Mapping during right ventricular
pacing revealing left lateral accessory pathway with eccentric atrial
activation noted in the CS channels. Right hand panel.Fluoroscopic view demonstrating position of catheters in RAO
30o view (upper figure) and LAO 40oview (lower figure). The red arrow marks the tip of radiofrequency
ablation catheter and the white arrow marks the position of the pacing
catheter inside the right ventricle.
Figure 2. Left hand panel. Intracardiac electrograms at the
start of radiofrequency energy application. Note that the atrial
activation pattern changes on the 2nd beat after
initiation of ablation, suggesting a successful site. Also note, the
last QRS complex is narrower. Right hand panel. Note the
alternating wide and narrow QRS morphology.
Figure 3. Intracardiac electrograms during radiofrequency
energy application, the same as the right-hand panel of Figure 2. Note
that ventricular activation in the CS channels change along with
alternating wide and narrow QRS morphology. Also note that after the
narrow QRS beat multiple electrograms follow the ventricular electrogram
in the RF distal channel. The first one is likely to be an artefact, the
second and third ones being split atrial potentials.