| LBBB (n= 32) | RBBB (n= 4) | Non-specific IVCD (n= 20) |
---|---|---|---|
Age (years) | 66 ± 11 | 65 ± 9 | 67 ± 10 |
Males | 21 (66%) | 2 (50%) | 19 (95%)* |
Aetiology of heart failure | Â | Â | Â |
   Ischaemic | 9 (28%) | 3 (75%) | 10 (50%) |
   Non-ischaemic | 23 (72%) | 1 (25%) | 10 (50%) |
NYHA class | Â | Â | Â |
   III | 28 (88%) | 4 (100%) | 17 (85%) |
   IV | 4 (12%) | 0 (0%) | 3 (15%) |
QRS duration (ms) | 160 (140-180) | 140 (125-170) | 120 (120-130)§ |
QRS ≥ 150 ms | 22 (69%) | 1 (25%) | 4 (20%)†|
LEFT axis | 15 (47%) | 3 (75%) | 10 (50%) |
LVEF (%) | 23 ± 6 | 25 ± 6 | 21 ± 7 |
RVEF (%) | 37 ± 11 | 38 ± 9 | 34 ± 8 |