Figure 18From: Understanding atrioventricular septal defect: Anatomoechocardiographic correlation Atrioventricular septal defect with a balanced form common valve. (A) The common valve is equally shared by the two ventricles. (B) The echocardiographic image at the level of both ventricles shows the same features that are apparent in the anatomic specimen. Other abbreviations as before.Back to article page