Table 1.
| Main Results | OT-WS group n = 55 | Conventional group n = 64 | P-value |
|---|---|---|---|
| Demographics | |||
| Age, years | 54.4 ± 11.9 | 52 ± 16.6 | 0.385 |
| Women | 44 (80) | 45 (70.3) | 0.522 |
| Heart disease | 2 (3.6) | 1 (1.6) | 0.603 |
| Redo | 3 (5.5) | 3 (4.7) | 1 |
| EPS parameters | |||
| AH-interval, ms | 97.8 ± 27.7 | 96.1 ± 23.6 | 0.617 |
| HV-interval, ms | 48.3 ± 7.2 | 47.7 ± 5.4 | 0.637 |
| Proportion of patients with PR > RR interval during incremental atrial pacing | 25 (45.5) | 32 (50) | 0.453 |
| AH-jump | 50 (91) | 59 (92.2) | 0.188 |
| 1:1 cycle length conduction over fast pathway (ms) | 454 ± 84 | 463 ± 92 | 0580 |
| 1:1 cycle length conduction over slow pathway (ms) | 355 ± 69 | 365 ± 78 | 0463 |
| Ablation procedure (univariate analysis) | |||
| Use of contact-force catheter | 24 (43.6) | 29 (45.3) | 0.794 |
| LSI in the success zonea | 4.1 ± 1 | 3.5 ± 0.9 | 0.029 |
| JR > 30 s | 20 (36.4) | 11 (17.2) | 0.017 |
| Successful RF in Zone 1 | 23 (44) | 14 (21.8) | 0.033 |
| RF applications until success | 3.9 ± 2.8 | 8.2 ± 6.7 | <0.001 |
| RF time until success, s | 100 [63–131] | 146.5 [82–226.5] | 0.001 |
| His distance (mm) | 18.1 ± 6.4 | 15.6 ± 8 | <0.06 |
| His distance ≤ 10 mm | 6 (10) | 19 (29) | <0.012 |
| Incidence rate ratio of RF applications adjusted for potential confounders (multivariable analysis) | ||||||
|---|---|---|---|---|---|---|
| Univariate | Multivariateb | |||||
| Estimated coef. (CI 95%) | SE | P-value | Estimated coef. (CI 95%) | SE | P-value | |
| OT-WS group | −35 (−59.6/−10.34) | 12.4 | <0.006 | −40.24 (−64/−16.4) | 12 | <0.001 |
| JR time > 30 s | 4.9 (−23/39.8) | 14.1 | <0.728 | 5.7 (−22/33) | 13.7 | <0.680 |
| Successful RF in Zone 1 | 14.1 (−11.2/39.4) | 12.8 | <0.272 | 21.7 (−3.8/47.2) | 12.9 | <0.095 |
| Total ablation procedure time (s) adjusted for potential confounders (multivariable analysis) | ||||||
|---|---|---|---|---|---|---|
| Regressions coefficients and their significance | ||||||
| Univariate | Multivariatec | |||||
| Estimated coef. (CI 95%) | SE | P-value | Estimated coef. (CI 95%) | SE | P-value | |
| OT-WS group | −35 (−59.6/−10.34) | 12.4 | <0.006 | −40.24 (−64/−16.4) | 12 | <0.001 |
| JR time > 30 s | 4.9 (−23/39.8) | 14.1 | <0.728 | 5.7 (−22/33) | 13.7 | <0.680 |
| Successful RF in Zone 1 | 14.1 (−11.2/39.4) | 12.8 | <0.272 | 21.7 (−3.8/47.2) | 12.9 | <0.095 |
Results are expressed as mean ± standard deviation or number and (percentage).
aOnly in patients with contact-force catheter use.
bModel adjusted for OT-WS group, RF application on success in Zone 1, and JR time > 30 s in at least one RF application. IRR, incidence rate ratio; CI, confidence interval; OT-WS, Omnipolar and WaveSpeed; JR, junctional rhythm; RF, radiofrequency.
cModel adjusted for OT-WS group, RF application on success in Zone 1, and JR time > 30 s. Coef., coefficients; CI, confidence interval; SE, standard error; OT-WS, Omnipolar and WaveSpeed; JR, junctional rhythm.