Table 1.
Clinical characteristics of all patients and patients with successful and unsuccessful nsLBBp implants.
| All n = 96 | Patients with proved nsLLBp n = 57 | Patients without proved nsLBBp n = 39 | p value | |
|---|---|---|---|---|
| Age (years), mean ± SD | 77 ± 8 | 77 ± 8 | 77 ± 8 | 0.66 |
| Male gender, n (%) | 59 (61) | 31 (54) | 28 (72) | 0.09 |
| Comorbidities | ||||
| • Heart failure, n (%) | 17 (18) | 6 (11) | 11 (28) | 0.02 |
| • Coronary heart disease, n (%) | 37 (39) | 16 (28) | 21 (54) | 0.01 |
| • Diabetes mellitus, n (%) | 41 (43) | 18 (32) | 23 (59) | 0.007 |
| • Hypertension, n (%) | 79 (82) | 46 (81) | 33 (85) | 0.62 |
| LV ejection fraction (%), mean ± SD | 56 ± 6 | 57 ± 6 | 56 ± 6 | 0.98 |
| Septal thickness, mean ± SD | 11.1 ± 2 | 10.9 ± 1 | 11.4 ± 2 | 0.03 |
| Pacing indications | ||||
| • AV block, n (%) | 57 (59) | 28 (49) | 29 (74) | 0.01 |
| • SSSy, n (%) | 28 (29) | 23 (40) | 5 (13) | 0.004 |
| • Bi-, trifascicular block, n (%) | 8 (8) | 4 (7) | 5 (13) | 0.33 |
| • Atrial fibrillation with planned AV junctional ablation, n (%) | 3 (3) | 2 (4) | 0 (0) | ns |
| QRS morphology | ||||
| • LBBB, n (%) | 13 (14) | 6 (11) | 7 (18) | 0.29 |
| • RBBB, n (%) | 23 (24) | 11 (19) | 12 (31) | 0.20 |
| • IVCD, n (%) | 11 (11) | 7 (12) | 4 (10) | 0.23 |
| • Narrow QRS, n (%) | 49 (51) | 33 (58) | 16 (41) | 0.10 |
SSSy, sick sinus syndrome; AV, atrioventricular; LBBB, left bundle branch block; RBBB, right bundle branch block; IVCD, non-specific intraventricular conduction delay; narrow QRS, QRSd <120 ms. Bold values are used to highlite a significant difference. ns, nonsignificant.