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Figure 3 Histological Section

The section demonstrates the piercing of the atrioventricular bundle through the membranous septum, exiting superficially along the crest of the interventricular septum, and continuing to supply the left ventricle. Reprinted with permission from Benson R. Wilcox, Andrew C. Cook, Robert H. Anderson, Surgical Anatomy of the Heart, 3rd Edition (New York, NY: Cambridge University Press, 2005).