Atrial Septal Defect (ASD)
ASD is a common congenital heart disease where the septum of the heart is not properly formed. This creates a left-to-right shunt, which leads to mixing of oxygenated and deoxygenated blood. This causes pulmonary hypertension and right heart enlargement.
Procedures to treat ASD

Risks of the procedures
Although the success rate is about 95%, the procedures still have some risks involved, such as: