Table 3 Comparison of mechanical dyssynchrony according to QRS pattern and QRS duration
|  | Control group | LBBB | RBBB | Non-specific IVCD | QRS < 150 ms | QRS ≥ 150 ms |
|---|---|---|---|---|---|---|
| Â | (n = 25) | (n = 32) | (n = 4) | (n = 20) | (n = 29) | (n = 27) |
SD of LV mean phase (°) | 10.9 (8.2-16.1) | 42.3 (24.7-77.9)* | 35.4 (28.8-39.2)* | 43.4 (36.0-59.6)* | 36.9 (27.0-50.4)* | 48.4 (29.5-78.1)* |
SD of RV mean phase (°) | 16.9 (12.3-19.6) | 27.2 (18.8-38.8)* | 20.4 (11.9-34.9) | 25.5 (17.8-36.0)* | 26.1 (18.8-35.9)* | 25.5 (17.4-39.8)* |
Interventricular delay (°) | 5.0 (3.0-11.5) | 21.0 (8.5-34.8)* | 17.5 (4.0-40.0) | 14.0 (6.5-25.3)* | 19.0 (6.5-28.0)* | 21.0 (8.0-28.0)* |
Intra LV dyssynchrony | Â | 28 (88%) | 4 (100%) | 20 (100%) | 26 (90%) | 25 (93%) |
Intra RV dyssynchrony | Â | 18 (56%) | 2 (50%) | 10 (50%) | 16 (55%) | 14 (52%) |
Interventricular dyssynchrony | Â | 22 (69%) | 2 (50%) | 10 (50%) | 16 (55%) | 17 (63%) |