3.2 Electrophysiologic and CT-based findings, per study group
On voltage mapping, 1759 ± 767 points were acquired per patient. LAPWI required 34 ± 12 ablation points: 16 ± 7 for the roof line and 17 ± 5 for the floor line. Gaps were detected in 22 patients (40%), with 22 gaps due to first-pass LAPWI failure and 4 due to dormant conduction (Figure 3). A representative case of a gap in the center of the roof line lesion is shown in the Figures 1 and 2. The electrophysiologic features and LAPW thicknesses are shown per group in Table 2. Overall, mean bipolar voltage along the ablation line and mean LAPW thickness were greater in the Gap group than in the Successful first-pass group. The roof line was longer, and mean bipolar voltage and thickness of the LA wall at the roof line were greater in patients with a gap in the roof line than in other patients. However, no differences were seen in the floor line. Significant correlation was found between LAPW thickness and bipolar voltage (r = 0.25, P < 0.0001) (Figure 4).