Fig. 3From: CT imaging features of atrioventricular shunts: what the radiologist must knowDevelopment of the AV canal at the embryological stages of 4, 6, 9 and 12 mm. The endocardial cushions proliferate in different planes, not only dividing the AV canal in a left mitral and right tricuspid canal but also forming part of the membranous ventricular septum and closing the atrial OPBack to article page