children s health issues
Atrioventricular Septal Defects
Types of atrioventricular septal defect
An AV septal defect may be Complete, with a large septal defect that includes both the atria and the ventricles, and a single atrioventricular valve Transitional, with a small or moderate-sized ventricular septal defect in addition to the atrial septal defect Partial, with an atrial septal defect but no ventricular septal defect, and the common AV valve separated into a right- and a left-sided AV valve Most infants with the complete form have Down Syndrome (Trisomy 21) . Atrioventricular septal defect is also common among infants who have other organ system abnormalities including being born without a spleen or with multiple small spleens. 