Table 2.
Electrophysiological voltage mapping results in 26 patients and procedural characteristics of jointed catheter ablation in all patients after initial thoracoscopic epicardial ablation
| Parameter | Persisting normal potentials, n (%) | Ratio of normal voltage, %, mean ± SD | Reinforced or touch-up CA, n (%) |
|---|---|---|---|
| Left atrial lesions (n = 26) | |||
| Left PV isolation loop | 1 (3.8) | —— | 16 (59.3) |
| Right PV isolation loop | 0 | —— | 15 (55.6) |
| Roof line | 7 (26.9) | 8.6 ± 21.0 | 26 (96.3) |
| Inferior line | 9 (34.6) | 7.8 ± 13.6 | 6 (22.2) |
| Left fibrous trigone line | 11 (42.3) | 11.2 ± 13.7 | 17 (63.0) |
| Left inferior PV to GCV/MI | 15 (57.7) | 22.4 ± 23.2 | 26 (96.3) |
| Right atrial lesions (n = 8) | |||
| SVC-IVC line | 1 (12.5) | 3.2 ± 9.1 | 1 (3.7) |
| IVC-RAA tip line | 6 (75) | 28.4 ± 25.5 | 0 (0) |
| Line from the tip to the base of RAA | 2 (25) | 12.4 ± 23.5 | 0 (0) |
| Coronary sinus lesion | —— | —— | 13 (48.1) |
| Cavotricuspid isthmus line | —— | —— | 27 (100) |
CA, Catheter ablation; PV, pulmonary vein; GCV, great cardiac vein; MI; mitral isthmus; SVC, superior vena cava; IVC, inferior vena cava; RAA, right atrial appendage.