Results of catheter ablation of the atrioventricular junction, accessory pathways, and atrioventricular nodal re-entrant tachycardia from a multicentre prospective clinical trial
| Arrhythmia | Number of patients | Medium number (range) of RF applications | Number of patients requiring second procedure for success | Success with investigational system | Overall success | Recurrence1-150 |
| Atrioventricular junction | 121 | 4 (1–57) | 3 (3%) | 108 (89%) | 121 (100%) | 2 (2%) |
| AVNRT | 373 | 6 (1–73) | 3 (1%) | 348 (93%) | 362 (97%) | 16 (5%) |
| Accessory pathway | 500 | 6 (1–98) | 24 (5%) | 398 (80%) | 465 (93%) | 31 (8%) |
| LFW | 270 | 5 (1–77) | 9 (3%) | 224 (82%) | 257 (95%) | 7 (3%) |
| RFW | 92 | 9 (1–98) | 6 (7%) | 66 (72%) | 83 (90%) | 9 (14%) |
| Posteroseptal | 98 | 6 (1–46) | 8 (8%) | 73 (74%) | 86 (88%) | 9 (12%) |
| Septal | 40 | 6 (1–31) | 1 (3%) | 35 (88%) | 39 (98%) | 6 (17%) |
| Multiple accessory pathways | 36 | 16 (1–54) | 8 (22%) | 24 (67%) | 31 (86%) | 5 (21%) |
| Multiple targets | 20 | 16 (2–58) | 4 (20%) | 11 (55%) | 17 (85%) | 2 (17%) |
| Total | 1050 | 6 (1–98) | 42 (4%) | 889 (85%) | 996 (95%) | 56 (6%) |
↵1-150 Analysis of arrhythmia recurrence was confined to those patients in whom success was achieved with the investigational ablation system.
AVNRT, atrioventricular nodal re-entrant tachycardia; LFW, left free wall; RFW, right free wall; RF, radiofrequency.
Reproduced from Calkins et al, Circulation1999;99:262–70, with permission of the publisher.