ATRIAL SEPTAL DEFECT (ASD)
Commonly described as a “hole in the heart”
An ASD is an opening in the wall, or septum, that separates the two upper chambers of the heart, called the left atrium and right atrium. An ASD occurs when the septum does not form or close properly.
- Most are present at birth.
- Affect nearly six in 10,000 births.1
- Can result from an interventional procedure that requires crossing the septum, such as a mitral valve repair.