Introduction
Methods
Study design
Patient cohort
Electrophysiology procedure
Pre-ablation imaging
Conventional guided navigation
Remote magnetic navigation
Data collection and analysis
Statistics
Results
Population (Table 1, Figs. 1 and 2)
Parameters | All patients | RMN | CVN | P Value |
---|---|---|---|---|
N | 62 | 27 | 35 | 0.310 |
Median age (1–3 QR) | 19.7 (3.9) | 21 (18–22) | 20 (17–23) | 0.976 |
Gender: female (N, %) | 32 (51.6 %) | 15 (56 %) | 17 (49 %) | 0.585 |
Congenital HD (N, %) | 31 (50 %) | 18 (67 %) | 13 (37 %) | 0.021*
|
Implanted pacemaker (N, %) | 5 (8.1 %) | 4 (15 %) | 1 (3 %) | 0.086 |
Previous surgery (N, %) | 23 (37 %) | 16 (59 %) | 7 (20 %) | 0.002*
|
Previous ablation (N, %) | 9 (14.5 %) | 6 (22 %) | 3 (9 %) | 0.130 |
Atrial tachycardia (N, %) | 14 (22.6 %) | 6 (22 %) | 8 (23 %) | 0.953 |
AVRT (N, %) | 22 (35.5 %) | 6 (22 %) | 16 (46 %) | 0.055 |
AVNRT (N, %) | 14 (22.6 %) | 6 (22 %) | 8 (23 %) | 0.953 |
Ventricular extrasystoles (N, %) | 5 (8.1 %) | 4 (15 %) | 1 (3 %) | 0.086 |
Ventricular tachycardia (N, %) | 4 (6.5 %) | 3 (11 %) | 1 (3 %) | 0.190 |
Atrial fibrillation (N, %) | 1 (1.6 %) | 1 (4 %) | 0 (0 %) | 0.251 |
Atrial flutter (N, %) | 2 (3.2 %) | 1 (4 %) | 1 (3 %) | 0.852 |
Pre-abation imaging (N) | 19 (31 %) | 7 CMR, 5 CT | 5 CMR, 2 CT | 0.101 |
Total procedure time (min, 1–3 IQR) | 152 (98, 214) | 180 (133.0–240.0) | 130 (94.5–192.5) | 0.034*
|
Fluoroscopy time (min, 1–3 IQR) | 4.25 (2.5, 10.2) | 4.1 (1.5–5.85) | 5.2 (3.2–11.1) | 0.020*
|
RF time (min, 1–3 IQR) | 10.4 (5.5, 18.4) | 11.7 (7.5–23.5) | 10.0 (4.7–13.6) | 0.094 |
General anaesthesia (N, %) | 35 (56.5 %) | 18 (67 %) | 17 (49 %) | 0.154 |
Acute success | 91.9 % | 93 % | 91 % | 0.867 |
Arrhythmia-free follow-up | 67 % | 65 % | 69 % | 0.765 |
Procedure parameters: RMN versus CVN (Table 2, Fig. 3)
Parameters | RMN | CVN | P-value |
---|---|---|---|
N | 18 | 13 | 0.369 |
Ebstein’s anomaly (N, %) | 2 (11 %) | 6 (46 %) | 0.028*
|
Tetralogy of Fallot (N, %) | 2 (11 %) | 2 (15 %) | 0.726 |
Corrected TGA (N, %) | 5 (28 %) | 1 (8 %) | 0.164 |
Post Fontan procedure (N, %) | 4 (22 %) | 2 (15 %) | 0.634 |
Ventricular septal defect (N, %) | 2 (11 %) | 2 (15 %) | 0.726 |
Previous cardiac surgery (N, %) | 16 (89 %) | 7 (54 %) | 0.030*
|
Previous ablation (N, %) | 5 (28 %) | 2 (15 %) | 0.423 |
Targeted arrhythmia | |||
Atrial tachycardia (N, %) | 6 (33 %) | 7 (54 %) | 0.253 |
Ventricular tachycardia (N, %) | 3 (17 %) | 1 (8 %) | 0.462 |
Ventricular extrasystoles (N, %) | 4 (22 %) | 0 (0 %) | 0.069 |
AVNRT (N, %) | 2 (11 %) | 0 (0 %) | 0.214 |
AVRT (N, %) | 1 (6 %) | 5 (38 %) | 0.022*
|
Atrial fibrillation (N, %) | 1 (6 %) | 0 (0 %) | 0.388 |
Atrial flutter (N, %) | 1 (6 %) | 0 (0 %) | 0.388 |
Procedure parameters | |||
General anaesthesia (N, %) | 15 (83 %) | 10 (77 %) | 0.661 |
Pre-ablation imaging (N) | 6 CMR, 3 CT | 1 CMR | 0.453 |
Median procedure time (min, 1–3 IQR) | 186 (154, 264) | 203 (130, 223) | 0.674 |
Median fluoroscopy time (min, 1–3 IQR) | 3.7 (2.3, 6.2) | 4.1 (3.3, 11) | 0.123 |
Median radiofrequency time (min, 1–3 IQR) | 18.2 (9.4, 24.6) | 12.2 (11, 22.4) | 0.603 |
Acute success | 94 % | 100 % | 0.395 |
Arrhythmia-free follow-up | 67 % | 62 % | 0.873 |
Redo ablation (N,%) | 4 (22 %) | 1 (8 %) | 0.286 |