Atrioventricular Septal Defect 4, also known as avsd4, is related to ventricular septal defect 1. An important gene associated with Atrioventricular Septal Defect 4 is GATA4 (GATA Binding Protein 4). Affiliated tissues include heart and heart-atrium, and related phenotype is primum atrial septal defect.