Ablation results
Ablation characteristics are shown in Table 2 . All PVs were
successfully isolated, and complete conduction block at the LA roof was
obtained in 52 patients (96.3%). Touch-up ablation with an irrigated RF
catheter was required in 18 (33.3%) patients during PVIs (left superior
PV: 3, left inferior PV: 3, right superior PV: 4, right middle PV: 1,
right inferior PV: 9), and in seven (13.0%) patients during LA roof
line ablations. Touch-up ablation at the LAPW was performed in eight
patients (left inferior PV: 2, right superior PV: 2, right middle PV: 1,
right inferior PV: 3). The mean isolated area of the LAPW, defined as
the ratio of the scar area in the LAPW (voltage <0.1 mV) to
the whole LAPW area, was 68.8 ± 21.0%.
LET during CBA reached 15°C in 19 patients (35.2%) (Figure 3) .
LET reached 15°C most frequently during LIPV isolation (18 patients
[33.3%]), while a drop in LET below 15°C during LA roof ablation
occurred in 14 patients (25.9%). Transient phrenic nerve injury was
observed in two patients (3.7%). No other procedural complications,
such as stroke or cardiac tamponade, were observed.