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Figure 2 Ostial ablation of the left inferior pulmonary vein (LIPV) with a single electrical breakthrough using the earliest activation mapping. (Left) During distal coronary sinus pacing, sequential activation in a cascade from the site of the earliest breakthrough (between bipole 3 to 4 and 4 to 5, shown with an asterisk) was observed at the anterior wall of LIPV. (Right) Local ablation at LIPV ostium corresponding to this site (asterisk) eliminated all pulmonary vein potentials (PVPs). IIII and V1 represent recordings from 12-lead surface ECG.
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