Atrial septal defect (ASD)

Congenital heart defect - ASD; Birth defect heart - ASD; Primum ASD; Secundum ASD

Atrial septal defect (ASD) is a heart defect that is present at birth (congenital).

As a baby develops in the womb, a wall (septum) forms that divides the upper chamber into a left and right atrium. An abnormal formation of this wall can result in a defect that remains after birth. This is called an atrial septal defect, or ASD.

Atrial septal defect

An atrial septal defect is a congenital heart defect where the wall between the right and left atria does not close properly, leaving a hole between the two atria.

Facts, causes, and treatment of congenital heart defects.

Causes

Symptoms

Exams and Tests

Treatment

Outlook (Prognosis)

Possible Complications

When to Contact a Medical Professional

Prevention