| Responders (n= 23) | Non Responders (n= 25) | p |
---|---|---|---|
Age (years) | 67 ± 11 | 65 ± 11 | 0.64 |
Males | 15 (65%) | 21 (84%) | 0.19 |
Aetiology of heart failure | Â | Â | Â |
   Ischaemic | 6 (26%) | 11 (44%) | 0.24 |
   Non-ischaemic | 17 (74%) | 14 (56%) |  |
NYHA class | Â | Â | Â |
   III | 21 (87%) | 23 (92%) | 0.67 |
   IV | 3 (13%) | 2 (8%) |  |
QRS duration (ms) | 150 (120-160) | 140 (120-180) | 0.77 |
QRS ≥ 150 ms | 12 (52%) | 12 (48%) | > 0.99 |
LEFT axis | 11 (48%) | 14 (56%) | 0.77 |
QRS morphology | Â | Â | Â |
   LBBB | 19 (83%) | 9 (36%) | 0.001* |
   RBBB | 0 (0%) | 3 (12%) | 0.24§ |
   Non-specific IVCD | 4 (17%) | 13 (52%) | 0.017†|
LVEF (%) | 23 ± 5 | 20 ± 6 | 0.05 |
RVEF (%) | 37 ± 8 | 36 ± 10 | 0.74 |
SD of LV mean phase (°) | 43.0 (24.0-73.0) | 43.0 (35.5-64.5) | 0.48 |
SD of RV mean phase (°) | 28.0 (19.0-40.0) | 26.0 (17.5-36.5) | 0.40 |
Interventricular delay (°) | 21.0 (8.0-38.0) | 20.0 (8.5-27.5) | 0.56 |
Intra LV dyssynchrony | 20 (87%) | 24 (96%) | 0.34 |
Intra RV dyssynchrony | 16 (70%) | 13 (52%) | 0.25 |
Interventricular dyssynchrony | 16 (70%) | 15 (60%) | 0.56 |