Atrioventricular Septal Defect with Intact Interatrial Septum. Case Report

In atrioventricular septal defect (AVSD), anatomical lesions usually are an ostium primum atrio-septal defect; a common atrioventricular valve, an inlet ventricular septal defect (VSD). It is most often associated with major chromosomal abnormalities. It is the most common congenital disease in Down syndrome. Our case was an infant with a Down syndrome who was admitted for a dyspnea (stage 3 in New York Heart Association classification) and tachycardia. The diagnosis was made by a transthoracic echocardiography. It showed a rare variety of atrioventricular septal defect without an atrial septal defect. The child was treated successfully with one patch technic and no recurrence was noted.