Table 2.
Procedural characteristics
| SMC1 | SMC2 | p value | |
|---|---|---|---|
| Mapping catheter size [n (%)] | |||
| 20 mm (8 electrodes) | 57 (100) | 12 (12) | |
| 25 mm (10 electrodes) | 0 (0) | 89 (88) | |
| Procedure duration (min) | 72.0 ± 18.9 | 74.4 ± 19.1 | 0.432 |
| Fluoroscopy time (min) | 15.7 ± 6.6 | 15.7 ± 7.0 | 0.593 |
| PVs isolated [n (%)] | 226 (100) | 397 (100) | 1.000 |
| Freezes per patient (n) | 5.5 ± 1.5 | 6.5 ± 1.9 | 0.001 |
| Freeze duration per patient (min) | 14.1 ± 4.5 | 17.6 ± 5.6 | < 0.001 |
| Freeze abortion [n (%)] | 4 (1.3) | 32 (4.9) | 0.010 |
| PNP | 4 | 7 | 0.981 |
| LET | 1 | 11 | 0.117 |
| Balloon dislodgment | 0 | 4 | 0.314 |
| Ineffectiveness | 0 | 9 | 0.036 |
| Mean TTI all PVs (s) | 44.2 ± 24.6 | 45.9 ± 27.4 | 0.834 |
| TTI LSPV | 49.9 ± 25.8 | 48.4 ± 20.6 | 0.532 |
| TTI LIPV | 30.5 ± 13.5 | 36.9 ± 18.4 | 0.130 |
| TTI RSPV | 40.6 ± 18.1 | 38.1 ± 17.6 | 0.627 |
| TTI RIPV | 53.8 ± 31.4 | 56.1 ± 40.5 | 0.637 |
| Complications [n (%)] | |||
| Pericardial tamponade [n (%)] | 0 (0) | 1 (1) | 1.000 |
| Groin hematoma [n (%)] | 1 (1.8) | 0 (0) | 0.361 |
| Other [n (%)] | 0 (0) | 0 (0) | 1.000 |