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Atrial Septal Defect (ASD)


Atrial septal defect (ASD) is a congenital heart condition characterized by an abnormal opening in the septum, the wall that separates the upper chambers (atria) of the heart. This defect allows oxygen-rich blood from the left atrium to mix with oxygen-poor blood from the right atrium, leading to inefficient circulation and increased workload on the heart.