Comparison of time to peak myocardial sustained systolic velocity (TS) (in ms) between heart failure patients with narrow and wide QRS complexes and normal controls
| Segment | 1. Controls (n=88) | 2. Narrow QRS (n=67) | 3. Wide QRS (n=45) | p Value (1 v 2) | p Value (1 v 3) | p Value (2 v 3) |
|---|---|---|---|---|---|---|
| Data are mean (SD). | ||||||
| Maximal difference in TS, maximal difference in time to peak myocardial sustained systolic velocity among all 12 left ventricular segments; TS-SD, standard deviation of the time to peak myocardial sustained systolic velocity of all 12 left ventricular segments. | ||||||
| Basal septal | 127 (19) | 165 (40) | 192 (52) | <0.001 | <0.001 | 0.001 |
| Basal anteroseptal | 124 (18) | 165 (43) | 176 (45) | <0.001 | <0.001 | NS |
| Basal anterior | 125 (26) | 179 (56) | 185 (43) | <0.001 | <0.001 | NS |
| Basal lateral | 131 (23) | 184 (58) | 211 (56) | <0.001 | <0.001 | 0.01 |
| Basal posterior | 131 (25) | 180 (50) | 204 (50) | <0.001 | <0.001 | 0.02 |
| Basal inferior | 129 (23) | 177 (46) | 193 (47) | <0.001 | <0.001 | NS |
| Mid-septal | 130 (28) | 173 (45) | 206 (62) | <0.001 | <0.001 | 0.001 |
| Mid-anteroseptal | 125 (25) | 158 (43) | 183 (63) | <0.001 | <0.001 | 0.02 |
| Mid-anterior | 126 (29) | 177 (55) | 179 (51) | <0.001 | <0.001 | NS |
| Mid-lateral | 125 (29) | 191 (66) | 195 (57) | <0.001 | <0.001 | NS |
| Mid-posterior | 125 (25) | 184 (55) | 201 (60) | <0.001 | <0.001 | NS |
| Mid-inferior | 136 (30) | 195 (59) | 212 (53) | <0.001 | <0.001 | NS |
| Maximal difference in TS | 53 (23) | 107 (54) | 130 (51) | <0.001 | <0.001 | 0.02 |
| TS-SD | 17.0 (7.8) | 33.8 (16.9) | 42.0 (16.5) | <0.001 | <0.001 | 0.009 |