Table 2.
Measured myocardial fiber orientation.
| Species | Septal wall | Lateral free wall | Anterior free wall | Posterior free wall | |
|---|---|---|---|---|---|
| Range | Mouse | 129.8 ± 12.9 | 124.2 ± 18.8 | 127.7 ± 16.7 | 123.5 ± 17.9 |
| Rabbit | 82.5 ± 17.9 | 75.8 ± 15.2 | 72.7 ± 19.1 | 78.7 ± 12.8 | |
| Sheep | 59.5 ± 16.1 | 58.2 ± 14.2 | 52.1 ± 14.3 | 58.1 ± 15.5 | |
| Subepicardial Helix Angle | Mouse | -58.6 ± 9.53 | -50.2 ± 14.7 | -35.9 ± 14.6 | -46.9 ± 14.4 |
| Rabbit | -42.6 ± 14.9 | -29.9 ± 14.6 | -27.7 ± 11.4 | -23.7 ± 13.9 | |
| Sheep | -28.2 ± 19.2 | -30.2 ± 8.74 | -24.3 ± 9.64 | -26.6 ± 9.26 | |
| Linearity | Mouse | 0.98 ± 0.011 | 0.99 ± 0.011 | 0.97 ± 0.025 | 0.98 ± 0.017 |
| Rabbit | 0.93 ± 0.14 | 0.94 ± 0.038 | 0.94 ± 0.050 | 0.97 ± 0.028 | |
| Sheep | 0.91 ± 0.070 | 0.95 ± 0.044 | 0.95 ± 0.055 | 0.94 ± 0.052 |
Fiber orientation is as characterized by the transmural range and linearity of the fiber helix angle, and subepicardial helix angle, as functions of both species and circumferential location of the ROI. Both the angular range and subepicardial angle are reported in degrees, whereas the linearity is dimensionless. All entries are mean ± SD.