Table 3.

Pulmonary blood flow distribution in horses at rest

Axis Rest Difference, Barn − Treadmill P
Treadmill Barn
Slope of relative flow vs. spatial dimension, % RPBF/cm
y −0.79 ± 0.58−1.09 ± 1.03 −0.31 ± 1.04 0.5
y−1.31 ± 0.79 −2.01 ± 1.33−0.42 ± 1.15 0.5
z −0.12 ± 0.48 −0.32 ± 0.56−0.20 ± 0.22 0.1
Center of flow, cm
x 30.9 ± 2.7 30.9 ± 2.6 0.0 ± 0.30.9
y 25.2 ± 1.0 25.0 ± 0.5−0.2 ± 0.5 0.4
z 41.2 ± 5.8 41.5 ± 5.7 0.3 ± 0.80.5
Heterogeneity of flow (CV, %)
25.6 ± 4.7 25.4 ± 4.3−0.2 ± 4.5 0.9
  • Values are means ± SD; n = 5 horses. y,y-coordinate (ventral to dorsal); y′,y-coordinate (controlled for dependence on z);z, z-coordinate (caudal to cranial); CV, coefficient of variation.