Table 2.
Procedural details of AF patients undergoing index versus repeat ablation
| Index (n = 3377) | Repeat (n = 738) | p value | |
|---|---|---|---|
| Energy form used | |||
| Radiofrequency | 77.0% | 94.6% | < 0.001 |
| Cryoballoon | 21.7% | 5.4% | < 0.001 |
| Rhythm before ablation | |||
| Sinus rhythm | 68.5% | 68.2% | 0.85 |
| Atrial fibrillation | 31.5% | 31.8% | 0.85 |
| Pulmonary vein isolation | |||
| Circumferential | 87.9% | 78.0% | < 0.001 |
| Segmental | 12.4% | 16.0% | 0.008 |
| Ablation strategy | |||
| Linear lesion | 14.6% | 26.6% | < 0.001 |
| Location LA | 49.2% | 60.7% | 0.006 |
| Location RA | 56.7% | 57.7% | 0.82 |
| Location CTI | 97.1% | 92.9% | 0.055 |
| CFAE | 7.8% | 25.1% | < 0.001 |
| Irrigated-tip catheters | 70.0% | 90.7% | < 0.001 |
| Mapping, imaging, and study | |||
| Conventional mapping | 39.3% | 40.2% | 0.63 |
| EAM | 58.0% | 58.3% | 0.88 |
| Pre-procedural imaging | 25.2% | 16.7% | < 0.001 |
| Mean RF application duration (sec) | 2580 (1657; 3656) | 1960 (1038; 3405) | < 0.001 |
| Mean fluoroscopy time (min) | 29 (20; 46) | 27 (17; 44) | < 0.001 |
| Mean dose area product (cGY × cm2) | 3744 (1898; 7234) | 3325 (1754; 6229) | 0.001 |
| Mean study duration (min) | 181.2 ± 71.9 | 163.6 ± 67.1 | < 0.001 |
All values are given as percentages or mean with standard deviation or quartiles. P value < 0.05 was considered significant
LA Left Atrium; RA Right Atrium; CTI Cavo-tricuspid Isthmus; CFAE Complex Fractioned Atrial Electrograms; EAM Electroanatomical Mapping; RF Radiofrequency; sec Seconds; min Minutes