Table 2.
Preimplant demographics and baseline activation parameters in volumetric responders and nonresponders
| Responder | Nonresponder | P | |
|---|---|---|---|
| Sex | |||
| M | 5 | 12 | .021 |
| F | 4 | 0 | |
| LBBB | |||
| Yes | 5 | 5 | .658 |
| No | 4 | 7 | |
| QRS duration (ms) | 165 ± 20 | 166 ± 21 | .897 |
| EF | 26.7 ± 8.4 | 24.0 ± 8.2 | .473 |
| VVsync | -45.7 ± 22.4 | -25.1 ± 29.3 | .227† |
| VVtat | 101 ± 22.0 | 98.9 ± 23.4 | .838 |
| LVtat | 86.4 ± 17.1 | 85.1 ± 27.7 | .904 |
| LVdisp | 28.2 ± 6.3 | 27.0 ± 8.7 | .726 |
EF = ejection fraction; LBBB = left bundle branch block; LVdisp = global left ventricular dispersion of activation; LVtat = left ventricular total activation time; VVsync = global left/right ventricular electrical synchrony; VVtat = global biventricular total activation time.
†
Nonparametric analysis.