Atrial septal defect (ASD)

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Learn about the types of atrial septal defects (ASD), how they are diagnosed, treated, and what the long-term outcomes for children with ASD.

Key points

  • An atrial septal defect (ASD) is a hole in the wall that divides the two upper chambers of the heart: the right and left atrium.
  • An ASD is one of the most common congenital heart defects and usually does not cause any symptoms in childhood.
  • Children whose ASD was repaired in childhood are expected to have a normal, healthy life span.
Last updated: October 15th 2021