(a)
(b)
Figure 9: Visualizations of the three-dimensional Purkinje structures (red) and corresponding endocardial surfaces (blue) for the canine ventricles. Here the view is vertically inverted for more convenient viewing. (a) The left endocardial surface and Purkinje network branch. The Purkinje network covers almost all of the endocardial surface, which coincides with observations from dissections. (b) The right endocardial surface and Purkinje network branch. The Purkinje network is oriented on the endocardial surface such that the His bundle connection is aligned with the septum-free wall seam, as observed in the dissected network.