Table 2.
Left bundle branch area pacing procedural outcomes in patient with right bundle branch block at baseline
| Procedural outcomes | |
|---|---|
| Total number of successful cases | 107 (88) |
| Device indication | |
| Primary CRT indication | 48 (45) |
| Pacing indication† | 48 (45) |
| RV pacing–induced cardiomyopathy† | 5 (5) |
| AV node ablation† | 6 (6) |
| Procedure duration (min) | 97 ± 48 |
| Fluoroscopy duration (min) | 16 ± 12 |
| Type of device | |
| CRT pacemaker | 12 (11) |
| Dual-chamber pacemaker | 47 (44) |
| Single-chamber pacemaker | 11 (10) |
| CRT defibrillator | 34 (32) |
| Dual-chamber defibrillator | 3 (3) |
| Pacing characteristics | Baseline | Follow-up | P value |
|---|---|---|---|
| R-wave amplitude (mV) | 10 ± 9 | 13 ± 5 | .08 |
| Impedance (Ω) | 635 ± 179 | 478 ± 116 | <.01 |
| LBBAP threshold (V at 0.5 ms) | 0.8 ± 0.3 | 0.7 ± 0.3 | .38 |
| Stimulus to peak LV activation time (ms) | 85 ± 16 | ||
| LBBAP pacing burden (%) | 95 ± 8 |
Values are mean ± SD or n (%).
P values <.05 were considered statistically significant.
AV = atrioventricular; CRT = cardiac resynchronization therapy; LBBAP = left bundle branch area pacing; LV = left ventricle; RV = right ventricle.
†
Underlying right bundle branch block in sinus bradycardia, AV block, or prior to AV node ablation.