Atrial septal defect Atrial septal defect Atrial septal defect (ASD) Atrial septal defect (ASD) MedlinePlus Encyclopedia: Atrial Septal Defect Atrial septal defect (ASD) Atrial septal defect (ASD) Atrial septal defect (ASD) Atrial septal defect Atrial septal defect Atrial septal defect Atrial septal defect (ASD) Encyclopedia: Atrial Septal Defect Atrial septal defect (ASD) Atrial septal defect Atrial septal defect Atrial septal defect Atrial septal defect (ASD) Atrial septal defect Atrial septal defect Atrial septal defect https://medlineplus.gov/ency/article/000157.htm