Fig. 7From: CT imaging features of atrioventricular shunts: what the radiologist must knowNormal anatomy of the interventricular septum. It consists of a thick muscular portion (m) and a thin oval-shaped membranous portion (asterisk). The latter lies immediately inferior to the aortic valve cusps (arrowhead) and the pulmonary valve cusps (arrow). RV right ventricle, LV left ventricleBack to article page