Table 2.
Myocardial volume increase
| Pacing Mode | Variable | Subepi | Midwall | Subendo | ANOVA (P) |
|---|---|---|---|---|---|
| Atrial pacing | ΔVin | 0.043±0.053 | 0.062±0.055 | 0.098±0.070 | 0.01 |
| V̇in | 4.7±5.8 | 6.8±6.1 | 10.8±7.7 | 0.01 | |
| LV pacing—early activated region | ΔVin | 0.019±0.029 | 0.036±0.029 | 0.072±0.044 | 0.012 |
| V̇in | 2.1±3.2 | 4.0±3.2 | 7.9±4.9 | 0.012 | |
| LV pacing—late activated region | ΔVin | 0.032±0.053 | 0.046±0.054 | 0.067±0.081 | NS |
| V̇in | 3.5±5.9 | 5.1±5.9 | 7.4±9.0 | NS |
Values are means ± SE. ΔVin, myocardial volume increase (ml/g); V̇in, rate of myocardial volume increase (ml·min−1·g−1) . ANOVA used for assessment of significant transmural gradient (P < 0.05). NS, not significant.