Table 1.
Goodness of fit to a line for the percent modulation as a function of tidal volume, for body surface and intracardiac CS, LV, RV, and RV-CS leads, across all animals
| Lead | R2 (nonoptimized) | R2 (optimized) | a | b |
|---|---|---|---|---|
| SURF | 0.45 ± 0.19 | 0.77 ± 0.11 | 16.61 | 0.51 |
| CS | 0.44 ± 0.22 | 0.69 ± 0.18 | 15.42 | −122.29 |
| LV | 0.47 ± 0.24 | 0.76 ± 0.20 | 17.50 | −41.37 |
| RV | 0.63 ± 0.22 | 0.76 ± 0.20 | 9.50 | −42.16 |
| RV-CS | 0.84 ± 0.14 | 0.91 ± 0.14 | 25.35 | −57.09 |
The coefficient of determination (medians ± SE) is reported for both nonoptimized and optimized percent modulation at tidal volumes (TVs) of 0, 250, 500, and 750 ml; n = 10. The regression coefficients derived from a least squares regression analysis (TV = a × percent modulation + b) between the TV and percent modulation are also presented.
SURF, body surface; CS, coronary sinus; LV, left ventricle; RV, right ventricle.