Table 4.
Acute procedural results. Global and per vein application analysis.
| Overall | ||||
|---|---|---|---|---|
| Total veins (n) | 6715 | |||
| Total applications | 12,491 | |||
| Applications per vein (n) | 1.8 ± 1.11 | |||
| Time per application (s) | 178.5 ± 57.83 | |||
| PV potentials; n (%) | 4098 (61.0) | |||
| TTE (s) | 52.9 ± 37.02 | |||
| Temperature at PVI (°C) | − 33.6 ± 9.92 | |||
| PVI with 1st application; (n/%) | 75.8 (6381) | |||
| Minimum temperature (°C) | − 45.4 ± 8.20 | |||
| Rewarming time (s) | 38.7 ± 20.15 | |||
| Per vein analysis | LSPV A | LIPVB | RSPVC | RIPVD |
|---|---|---|---|---|
| Total veins (n) | 1537 | 1534 | 1691 | 1660 |
| Total applications (n) | 2828 | 2766 | 3059 | 3148 |
| Applications per vein | 1.8 ± 1.07 | 1.8 ± 1.01 | 1.8 ± 1.06 | 1.9 ± 1.17 |
| Time per application (s) | 179.7 ± 56.14BD | 179.7 ± 59.74AD | 173.6 ± 58.76* | 179.4 ± 57.65AB |
| PV potentials (%) | 1110 (72.4)* | 967 (63.2) * | 997 (59.2) * | 834 (50.6) * |
| TTE (s) | 52.1 ± 34.14BC | 51 ± 34.3AC | 49.0 ± 38.88AB | 59.0 ± 39.62* |
| Temperature at PVI (°C) | − 35.2 ± 9.29D | − 31.3 ± 9.7* | − 33.2 ± 10.78D | − 34.4 ± 9.43C |
| PVI with 1st application; n (%) | 1487 (77.67)BCD | 1455 (78.35)AC | 1610 (75.0)ABD | 1552 (73.7)AD |
| Total cryotherapy time (s) | 330.3 ± 173.92BCD | 323.8 ± 162.16AC | 314.0 ± 174.86AB | 340.4 ± 193.07A |
| Minimum temperature (°C) | − 46.4 ± 8.04* | − 43.4 ± 7.84* | − 47.3 ± 8.07* | − 44.4 ± 8.20* |
| Rewarming time (s) | 43.3 ± 22.82* | 36.7 ± 18.94D | 41.0 ± 19.63* | 34.3 ± 17.80B |
Differences on averages by patient-location, since multiple applications could have received at each patient-location (on average 1.8 applications over each location) are shown, using a mixed-effects model and adjusting for multiple comparisons (Bonferroni). Locations with a significantly different value (p < 0.001) differing from all other locations are flagged with an asterisk. When the average compared is not different from another location (p > 0.05), the value is labeled with a letter corresponding to the non-significant locations (labeled from left to right: A, B, C, D).
Quantitative data are the mean ± standard deviation.
PV pulmonary vein, PVI PV isolation, TTE time to effect, LSPV left superior pulmonary vein, LIPV left inferior pulmonary vein, RSPV right superior pulmonary vein, RIPV right inferior pulmonary vein.