What's an Atrial Septal Defect (ASD)? (Video)
en español: Breve resumen: Comunicación interauricular
Medically reviewed by: KidsHealth Medical Experts
What's an Atrial Septal Defect (ASD)?
An atrial septal defect (ASD) — sometimes called a hole in the heart — is a heart defect some babies are born with. There's an abnormal opening in the dividing wall between the upper filling chambers of the heart (the atria).