ASD is a congenital (present since birth) heart defect in which the wall that separates the 2 upper chambers (atria) is perforated allowing the abnormal mixing of oxygenated and un-oxygenated blood.
If large enough, it can lead to rhythm disturbances and heart failure
but if small, no treatment is necessary. Echo
are very accurate in assessing the severity. It is correctable/curable.