Table 2.
Bipolar electrogram and ECG characteristics during ventricular arrhythmias.
| R-Ant./Lat. (N = 12) | R-L comm. (N = 22) | L-Ant./Lat. (N = 17) | P value | |
|---|---|---|---|---|
| Target amplitude, mV | 0.56 (0.33–0.99)a, b | 0.76 (0.50–1.16)a | 0.41 (0.35–0.67)b | 0.044* |
| Target duration, ms | 138.9 ± 14.5 | 139.1 ± 42.6 | 124.9 ± 35.4 | 0.416 |
| Earliest activation, ms | 25.8 ± 6.0 | 27.4 ± 7.4 | 29.5 ± 8.3 | 0.469 |
| Lead I morphology, n (%) | ||||
| R/RR'/RSR' | 11 (91.7)a | 9 (40.9)b | 2 (11.8)b | <0.05* |
| Rs (R/S ≥ 1) | 0 | 6 (27.3) | 3 (17.6) | >0.05 |
| rS (R/S <1) | 0 | 4 (18.2) | 3 (17.6) | >0.05 |
| QS, QRS | 1 (8.3)a | 3 (13.6)a | 9 (52.9)b | <0.05* |
| Precordial transition, n (%) | ||||
| V1 | 1 (8.3)a | 7 (31.8)a, b | 9 (52.9)b | <0.05* |
| V1-2 | 1 (8.3) | 3 (13.6) | 1 (5.9) | >0.05 |
| V2 | 1 (8.3) | 2 (9.1) | 0 | >0.05 |
| V2-3 | 4 (33.3) | 5 (22.7) | 7 (41.2) | >0.05 |
| ≥V3 | 5 (41.7) a | 5 (22.7) a, b | 0b | <0.05* |
| Precordial rebound notch, n (%) | ||||
| None | 0a | 16 (72.7)b | 10 (58.8)b | <0.05* |
| V1-2 | 1 (8.3) | 0 | 0 | >0.05 |
| V2-3 | 0 | 2 (9.1) | 6 (35.3) | >0.05 |
| V3-4 | 9 (75) a | 2 (9.1) b | 1 (5.9) b | <0.05* |
| V4-5 | 2 (16.7) | 2 (9.1) | 0 | >0.05 |
Values are presented as the mean ± SD, median (Q1–Q3), or n (%). ASV, aortic sinus of Valsalva; R-Ant./Lat., right-lateral/anterior ASV; R-L Comm., left-right commissure; L-Ant./Lat., left-lateral/anterior ASV. a or bDifferent letters indicate intergroup significance; e.g., for the “target amplitude,” significance is shown between R-L Comm. and L-Ant./Lat.
The Bold values and the symbol
*
highlight the P value < 0.05.