Purkinje Fibers in Canine False Tendons: New Anatomical and Electrophysiological Findings

Figure 2

The distribution characteristics of Purkinje fibers on chordae tendineae (true tendons) and FTs. (a) Lugol’s liquid staining in a dog’s endocardium: Purkinje fibers were dyed darker. (b, c, and d) No Purkinje fibers contained in chordae tendineae which connected to the mitral valve. (b) The enlarged triangular region of (a). (c) Masson’s staining of chordae tendineae (×100). (d) Connexin 40 immunohistochemical staining of chordae tendineae (×100). (e, f, g, and h) All of the FTs contain Purkinje fibers. (e) The enlarged star region of (a) (×5). (f) The enlarged rectangular area region of (e) (g) Masson’s staining of FTs (×100). (h) Connexin 40 immunohistochemical staining of FTs (×100).

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