van Nie C J
Acta Morphol Neerl Scand. 1983 Sep;21(3):225-8.
An extra atrioventricular node in a double outlet ventricle with a quite normal inflow septum in a calf is described. The anomaly resembles the topography of the conducting system in the calf heart in the embryonic stages from 13.5 mm-90 mm.