Table 2.
Comparison of procedure-related results.
| Provisional group (n = 38) | Empirical group (n = 95) | P-Value | |
|---|---|---|---|
| Mapping system Carto3/Ensite precision, n (%) | 30 (78.9)/8 (21.1) | 85 (89.5)/10 (10.5) | 0.158 |
| Spontaneous/induced AT, n (%) | 22 (57.9) | 7 (7.4) | <0.001 |
| MI-dependent AT | 19 (50.0) | 2 (2.1) | <0.001 |
| Ablation strategies, n (%) | |||
| PVI plus MIendo line | 38 (100) | 95 (100) | – |
| MIepi ablation | 10 (26.3) | 9 (9.5) | 0.016 |
| MVEI | 21 (55.3) | 95 (100) | <0.001 |
| LA roof line | 31 (81.6) | 75 (78.9) | 0.815 |
| BOX line | 6 (16.2) | 18 (19.4) | 0.805 |
| Anterior wall line | 0 (0) | 4 (4.2) | 0.326 |
| CTI line | 8 (21.6) | 19 (20.2) | 1.000 |
| CFAE elimination | 3 (7.9) | 9 (9.5) | 1.000 |
| SVC isolation | 7 (18.9) | 11 (11.6) | 0.397 |
| Arrhythmia termination patterns, n (%) | |||
| Catheter ablation | 33 (86.8) | 11 (11.7) | <0.001 |
| Ibutilide IV | 0 (0) | 6 (6.3) | 0.182 |
| MVEI | 0 (0) | 3 (3.2) | 0.557 |
| SECV | 5 (13.2) | 75 (78.9) | <0.001 |
| Ablation-related parameters | |||
| Procedure time, median (IQR) (min) | 120.0 (112.5, 156.0) | 120.0 (103.5, 138.5) | 0.255 |
| Total fluoroscopy time, median (IQR) (min) | 6.4 (4.2, 9.3) | 9.5 (5.9, 11.6) | 0.019 |
| Total fluoroscopy exposure, median (IQR) (mGy) | 69.0 (25.3, 160.2) | 122.0 (62.5, 234.1) | 0.010 |
| Total ablation duration, mean ± SD (s) | 2,068.1 ± 877.2 | 2,238.4 ± 738.8 | 0.307 |
| MIendo ablation time, mean ± SD (s) | 455.9 ± 192.2 | 368.0 ± 163.6 | 0.038 |
| Ethanol infusion, mean ± SD (ml) | 8.5 ± 3.4 | 9.4 ± 3.0 | 0.165 |
| Procedure-related complications, n (%) | |||
| Vascular access complications | 1 (2.6) | 3 (3.2) | 1.000 |
| Pericardial effusion | 0 (0) | 1 (1.1) | 1.000 |
AT, atrial tachycardia; MI, mitral isthmus; PVI, pulmonary vein isolation; MIendo, endocardial aspect of the mitral isthmus; MIepi, the epicardial aspect of the mitral isthmus, mainly localized in the distal coronary sinus and great cardiac vein; MVEI, Marshall vein ethanol infusion; CTI, cavotricuspid isthmus; CFAE, complex fractionated atrial electrograms; SVC, superior vena cava; IV, intravenous injection; SECV, synchronous electrical cardioversion; other abbreviations as in Table 1.