Table 3.
Operator learning curve (only control ablation protocol group, n = 57)
| Phase I (n = 11) | Phase II (n = 30) | Phase III (n = 16) | p value | |
|---|---|---|---|---|
| RF time PVI (sec, median [IQR]) | 2373 [2178, 2932] | 1892 [1665, 2105] | 1920 [1620, 2043] | 0.002 |
| Fluoro time (min, median [IQR]) | 2 [1, 3] | 2 [1, 3] | 2 [1, 3] | 0.887 |
| Fluoro dose (Gycm2, median [IQR]) | 237 [57, 528] | 240 [110, 438] | 170 [70, 269] | 0.621 |
| Procedure duration (min, median [IQR]) | 125 [116, 176] | 122 [105, 140] | 110 [102, 120] | 0.058 |
| Stick to map time (min, median [IQR]) | 24 [16, 29] | 21 [14, 30] | 16 [13, 24] | 0.401 |
| Map duration (min, median [IQR]) | 16 [14, 18] | 19 [17, 23] | 16 [14, 8] | 0.029 |
| RF duration (min, median [IQR]) | 97 [76, 106] | 74 [64, 83] | 72 [70, 81] | 0.104 |
| Number of lesions | 102 [79, 120] | 85 [77, 109] | 79 [71, 89] | 0.151 |
| First pass Isolation (%) | 6 (60) | 26 (90) | 16 (100) | 0.01 |
| CTI (%) | 3 (27) | 9 (30) | 2 (12) | 0.411 |
| RF time for CTI (sec, median [IQR]) | 294 [287, 442] | 303 [254, 368] | 419 [318, 520] | 0.972 |
| Overall RF time (sec, median [IQR]) | 2620 [2358, 3016] | 1976 [1891, 2206] | 1962 [1620, 2135] | 0.003 |
| Energy dose (Joules, median [IQR]) | 68,091 [56070, 75356] | 53,724 [47292, 57406] | 53,360 [43757, 57658] | 0.069 |
| Outcome data | 0.964 | |||
| Recurrence during FU (%) | 2 (18) | 5 (17) | 2 (14) | 0.264 |
| Redo procedures (%) | 0 (0) | 4 (67) | 1 (50) | 0.13 |
Data are presented as n (%) or median (IQR). Abbreviations: IQR interquartile range; RF radiofrequency energy; Fluoro fluoroscopy; CTI cavotricuspid isthmus ablation; FU follow-up