Table 2.
Procedural details.
| Variable | All | CB3 | CB2 | p |
|---|---|---|---|---|
| Number of PVs | 435 | 218 | 217 | |
| Total CB cycles until PVI | 1.1 ± 0.5 | 1.1 ± 0.6 | 1.1 ± 0.4 | 0.128 |
| Number of isolated PVs | 434/435 (99%) | 217/218 (99%) | 217/217 (100%) | 0.316 |
| Number of isolated PVs after 1st cycle | 390/435 (89.7%) | 191/218 (88%) | 199/217 (92%) | 1.000 |
| Minimal temperature [°C] | −47 ± 6 | −45 ± 6 | −48 ± 6 | < 0.0001 |
| Minimal esophageal-temperature [°C] | 33.7 ± 4 | 33.9 ± 4 | 33.5 ± 4 | 0.474 |
| Real-time recordings | 270 (62.1%) | 151 (69.2%) | 119 (54.8%) | 0.0392 |
| Time to PVI [s] | 47 ± 32 | 48 ± 32 | 45 ± 32 | 1.000 |
| Temperature after 30 s CB cycle duration [°C] | −31 ± 10 | −29 ± 11 | −32 ± 9 | 0.075 |
| Duration of total freezing time [s] | 200 ± 81 | 194 ± 77 | 206 ± 85 | 0.132 |
| Total procedure time [min] | 92 ± 28 | 94 ± 30 | 90 ± 27 | 0.525 |
| Total flouroscopy time [min] | 17 (13, 23) | 19 (14, 27) | 16 (13, 20) | 0.389 |
| Total amount of contrast [mL] | 115 ± 25 | 115 ± 25 | 116 ± 25 | 0.792 |
Values expressed as number (percentage), mean ± standard deviation or median (25th, 75th percentiles) as appropriate. CB — 28 mm cryoballoon; CB2 — second-generation cryoballoon; CB3 — third-generation cryoballoon; PV(s) — pulmonary vein(s); PVI — pulmonary vein isolation