Figure 8From: Understanding atrioventricular septal defect: Anatomoechocardiographic correlation Atrioventricular septal defect with common atrioventricular valve in dextroisomerism. (A) Note the mixed insertion of the anterior leaflets in the crest of the ventricular septum (Rastelli type A) and a papillary muscle (asterisk) adjacent to the ventricular septum (Rastelli type B). (B) Echocardiographic 4-chamber image in dextroisomerism shows a similar insertion.Back to article page