Table 3.
Procedural details—individual pulmonary veins
| Variable | POLARx |
|---|---|
| LSPV: | 305 |
| Total cycles until PVI | 1.2 ± 0.5 |
| Total cycles | 1.4 ± 0.6 |
| FAVI, (%) | 228 (75) |
| Bonus freeze cycles | 19 (6) |
| Minimal temp., (C°) | −59.2 ± 5.6 |
| Minimal oesophageal temp., (C°) | 31.9 ± 5 |
| Time to PVI, s | 48.1 ± 25.1 |
| Rate of TTI recordings, (%) | 201/258 (77.9) |
| Duration of total freezing time, s | 251 ± 115 |
| LIPV: | 305 |
| Total cycles until PVI | 1.1 ± 0.2 |
| Total cycles | 1.2 ± 0.5 |
| FAVI, (%) | 263 (86) |
| Bonus freeze cycles | 16 (5) |
| Minimal temp., (C°) | −56.0 ± 5.2 |
| Minimal oesophageal temp., (C°) | 28.5 ± 8.2 |
| Time to PVI, s | 43.5 ± 29.2 |
| Rate of TTI recordings, (%) | 181/258 (70.2) |
| Duration of total freezing time, s | 217 ± 100 |
| LCPV: | 12 |
| Total cycles until PVI | 1.6 ± 0.9 |
| Total cycles | 2.3 ± 1.1 |
| FAVI, (%) | 6 (50) |
| Bonus freeze cycles | 2 (17) |
| Minimal temp., (C°) | −63.9 ± 8.1 |
| Minimal oesophageal temp., (C°) | 33.5 ± 1.2 |
| Time to PVI, s | 46.4 ± 13.6 |
| Rate of TTI recordings, (%) | 5/9 (55.6) |
| Duration of total freezing time, s | 413 ± 148 |
| RSPV: | 317 |
| Total cycles until PVI | 1.2 ± 0.5 |
| Total cycles | 1.4 ± 0.8 |
| FAVI, (%) | 239 (75) |
| Bonus freeze cycles | 18 (7) |
| Minimal temp., (C°) | −58.3 ± 9.5 |
| Minimal oesophageal temp., (C°) | 33.7 ± 3.6 |
| Time to PVI, s | 43.7 ± 29.4 |
| Rate of TTI recordings, (%) | 193/277 (69.7) |
| Duration of total freezing time, s | 240 ± 135 |
| RIPV: | 317 |
| Total cycles until PVI | 1.1 ± 0.4 |
| Total cycles | 1.3 ± 0.6 |
| FAVI, (%) | 249 (79) |
| Bonus freeze cycles | 16 (5) |
| Minimal temp., (C°) | −57.5 ± 7.0 |
| Minimal oesophageal temp., (C°) | 31.9 ± 6.0 |
| Time to PVI, s | 50.0 ± 30.0 |
| Rate of TTI recordings, (%) | 181/277 (65.3) |
| Duration of total freezing time, s | 226 ± 105 |
Values expressed as n (%), mean ± standard deviation or median (range) as appropriate. PV(s) = Pulmonary vein(s), PVI = pulmonary vein isolation, RSPV = right superior pulmonary vein, RIPV = right inferior pulmonary vein, LCPV = left common pulmonary vein, LSPV = left superior pulmonary vein LIPV left inferior pulmonary vein, temp. temperature, TTI = time to isolation, FAVI = first attempt vein isolated.