Fig. 17From: CT imaging features of atrioventricular shunts: what the radiologist must knowFour-chamber view (a) and two-chamber view (b) of contrast-enhanced CT in a patient with a muscular VSD. The defect (arrow) is confined to only the muscular part of the IVS. Like in membranous VSD, a large defect can lead to congestive heart failure or pulmonary vascular disease. RV right ventricle, LV left ventricleBack to article page