Table 2.
Electrocardiographic characteristics at baseline and follow-up and initial device parameters by pacing modalities.
| BiV (n = 13) | HBP (n = 27) | LBBP (n = 10) | p Value | |
|---|---|---|---|---|
| Electrocardiographic characteristics | ||||
| Baseline QRS [ms] | 98 (±7) | 100 (±13) | 98 (±7) | 0.145 |
| Post-implant QRS [ms] | 172 (±13) | 105 (±17)) | 127 (±13) | <0.001 |
| Lead measurements | ||||
| Initial CSP/LV threshold [V] | 1.4 (1.1–1.75) | 1.25 (1–2) | 0.8 (0.5–1.1) | 0.006 |
| Initial CSP/LV impedance [ohm] | 760 (±229) | 526 (±87) | 750 (±77) | <0.001 |
Thresholds in BiV and HBP groups were measured at 1ms, in LBBP group at 0.5 ms. BiV: biventricular pacing; HBP: His bundle pacing; LBBP: Left bundle branch pacing; CSP: conduction system pacing; LV: left ventricle.