Introduction
Methods
Patient characteristics and study design
Intraprocedural management
PVI using the second-generation 28 mm CB
Phrenic nerve pacing
Postprocedural care
Repeat procedures
Follow-up
Statistical analysis
Results
Patient characteristics
Group I (bonus-freeze) | Group II (no bonus-freeze) |
p
| |
---|---|---|---|
Patients, n
Age (years) | 60 62 ± 11 | 60 61 ± 11 | 0.84 |
Female gender, n (%) | 24 (40) | 22 (37) | 0.24 |
Paroxysmal AF, n (%) | 45 (75) | 50 (83) | 0.54 |
Short persistent AF, n (%) | 15 (25) | 10 (17) | 0.54 |
Duration of AF (years) | 36 ± 40 | 35 ± 31 | 0.31 |
LA-size (mm) | 43 ± 5 | 42 ± 8 | 0.27 |
Arterial hypertension, n (%) | 42 (70) | 37 (62) | 0.86 |
Diabetes mellitus, n (%) | 8 (13) | 5 (8) | 0.36 |
Coronary artery disease, n (%) | 6 (10) | 9 (15) | 0.10 |
Prior stroke, n (%) | 3 (5) | 5 (8) | 0.11 |
Mean CHA2DS2-VASc-score | 1.95 | 1.8 | 0.27 |
Acute ablation results
Group I (bonus-freeze) | Group II (no bonus-freeze) |
p
| |
---|---|---|---|
Number of PVs, n
| 231 | 237 | |
Total CB cycles per PV | 2 (2, 2) | 1 (1, 1) | <0.001 |
Total CB cycles per PV until PVI | 1 (1, 1) | 1 (1, 1) | 0.24 |
Number of isolated PVs, n (%) | 230/231 (99) | 235/237 (99) | 0.66 |
Minimal CB2 temperature (°C) | −51.1 ± 6 | −48.2 ± 6 | <0.001 |
Minimal esophageal temp. (°C) | 34.6 (31, 36) | 35.3 (34, 36) | 0.05 |
Time to PVI (s) | 40 (27, 65) | 38 (28, 55) | 0.32 |
Procedure time (min) | 138.2 ± 29 | 113.8 ± 32 | 0.03 |
Fluoroscopy time (min) | 24.3 ± 8 | 19.2 ± 6 | 0.02 |
Amount of contrast medium (ml) | 160 (150, 200) | 120 (100, 140) | <0.001 |
Phrenic nerve palsy, n (%) | 2 (3) | 3 (5) | 1.00 |