Table 2.
Comparison of baseline and pacing heart rates, QRSd and stim-LVAT ((); median (IQR, 25–75%)).
| Parameters | LBBaP + AVNA (n = 46) | LVSP + AVNA (n = 10) | p-Value |
|---|---|---|---|
| Heart rate, beats/min | |||
| Baseline heart rate | 92.0 ± 25.7 | 94.9 ± 24.5 | 0.743 |
| Pacing heart rate | 70.0 ± 0 | 70.0 ± 0 | 1.000 |
| QRSd, ms | |||
| Baseline QRSd | 89.0 (82.0, 100.0) | 97.0 (89.0, 115.5) | 0.092 |
| At implantation | 109.0 (105.0, 117.0) a | 124.0 (119.3, 127.8) a | <0.001 |
| 1-month | 110.0 (105.0, 115.3) a | 124.0 (120.0, 130.0) a | <0.001 |
| 1-year | 110.0 (102.0, 114.0) a | 127.5 (124.5, 131.3) a | <0.001 |
| Stim-LVAT, ms | 73.5 (69.0, 77.0) | 91.5 (83.8, 100.5) | <0.001 |
QRSd = QRS duration, Stim-LVAT = pacing stimulus to left ventricular activation time, LBBaP = left bundle branch area pacing, LVSP = left ventricular septal pacing, AVNA = atrioventricular node ablation. a = intragroup comparison, compared to baseline QRSd, p < 0.05.