Abstract

An opening or hole (defect) in the wall (septum) that separates the top two chambers of the heart (atria). This defect allows oxygen-rich blood to leak into the oxygen-poor blood chambers in the heart. ASD is a defect in the septum between the heart's two upper chambers. The septum is a wall that separates the heart's left and right sides.

Keywords
Patent Foramen Ovale (PFO) abnormal heart sounds pulmonary hypertension transient ischemic attack (TIA)