radiofrequency (RF) application at the bottom of the left superior pulmonary
vein (LSPV) ostium eliminates all pulmonary vein (PV) potentials.
A fractionated continuium (gap eletrogram) is noted at the ostium, and
on mapping more distally, a double PV potential appears between the
atrial and ventricular electrograms (right panel, lower tracing).
Ablation eliminates all evidence of PV electrical conduction, as shown
in the corresponding electrocardiogram recorded from the same sites
after ablation (left panel) with local PV potentials dissociated at
a slow rate.
, M. and others,Catheter ablation of chronic atrial fibrillation targeting
the reinitiating triggers,J.Cardiovasc. Electrophysiol.2000;1112-10).