Table 3.
Procedural, electrical, and echocardiographic outcomes
| Conduction system pacing (n = 110) | Conventional pacing (n = 113) | P value | |||
|---|---|---|---|---|---|
| Procedure duration (min) | 130 ± 67 | 101 ± 65 | <.01 | ||
| Fluoroscopy duration (min) | 17 ± 12 | 16 ± 15 | .39 | ||
| Device type | |||||
| Pacemaker | 91 (83%) | 65 (58%) | <.01 | ||
| ICD | 19 (17%) | 48 (42%) | <.01 | ||
| Single-chamber | 9 (8%) | 21 (19%) | <.01 | ||
| Dual-chamber | 62 (56%) | 34 (30%) | <.01 | ||
| Biventricular | 39 (36%) | 58 (51%) | <.01 | ||
| Electrical characteristics | HBP | LBBAP | RVP | BVP (CS) | |
| Ventricular pacing leads, n (%) | 84 (76%) | 46 (42%) | 56 (50%) | 57 (50%) | |
| Baseline QRSd (ms) | 100 ± 23 | 111 ± 29 | 100 ± 21 | 138 ± 28 | <.01 |
| Paced QRSd (ms) | 122 ± 21 | 128 ± 14 | 162 ± 21 | 163 ± 26 | <.01 |
| Pacing threshold (implant) | 1.11 ± 0.7 | 0.63 ± 0.29 | 0.7 ± 0.33 | 1.38 ± 1.34 | |
| Pacing threshold (last f/u) | 1.1 ± 0.6 | 0.73 ± 0.22 | 0.55 ± 0.43 | 1.2 ± 0.74 | |
| Threshold increase >1 V | 6 | 0 | 0 | 3 | |
| Lead revision/abandoned | 2 | 0 | 5 | 1 | |
| LVEF | CSP (n = 77) | CP (n = 83) | |||
| Baseline LVEF | 46.5 ± 14.2 | 36.4 ± 16.1 | <.01 | ||
| Follow-up LVEF | 51.9 ± 11.2∗ | 39.5 ± 16.0∗ | <.01 | ||
| Subgroups | HBP (58) | LBBAP (19) | RVP (41) | BVP (42) | |
| Baseline LVEF | 46.4 ± 14.1 | 46.9 ± 15.1 | 50.3 ± 12.0 | 26.7 ± 10.5 | |
| Follow-up LVEF | 52.3 ± 10.9∗ | 50.1 ± 12.9 | 47.7 ± 13.2 | 33.8 ± 15.5∗ | |