2. Atrial Septal Defect
An atrial septal defect is an abnormal opening in the wall separating the left and right upper chambers (atria) of the heart.
Healthline.com (OMS Preferred Provider)

3. atrial septal defect - Symptoms, Treatments and Resources for atrial septal defect
Atrial septal defect is an abnormality of the upper chambers of the heart (atria) where the wall between the right and left atria does not close completely. This defect is present at birth (congenital).
MedHelp Q&A

4. Atrial Septal Defect, BD, NCBDDD, CDC
An atrial septal defect (ASD) is a hole (defect) in the wall (septum) that separates the two upper chambers of the heart, called atria. This hole between the heart chambers disrupts the flow of blood and oxygen to the body.
Centers for Disease Control and Prevention

5. Atrial Septal Defect (ASD)
An atrial septal defect is an opening in the atrial septum, or dividing wall between the two upper chambers of the heart known as the right and left atria. ASD is a congenital (present at birth) heart defect. As the...
www.muschealth.com

6. Atrial Septal Defect
DISCLAIMER: NOAH is an information guide only and cannot answer personal health-related or research questions. NOAH's information has been selected from a variety of consumer health resources; it is offered to you with the understanding that it no...
www.noah-health.org

7. Atrial Septal Defect (ASD)
Congenital heart defects (also called congenital heart diseases) are structural abnormalities that are present in the heart at birth.
my.clevelandclinic.org

8. Atrial Septal Defect
The last time Jeremy had a physical exam, his doctor listened to his heart once — and then he listened to it some more. At the end of the appointment, the doctor told Jeremy and his mom that he heard a heart murmur. Jeremy had to visit another doc...
kidshealth.org

9. Atrial Septal Defect
Atrial septal defect (ASD) is a congenital birth defect. It is an abnormality in the atria (the upper chambers of the heart). In ASD, the wall between the left and right chambers is not completely closed.
www.mbhs.org

10. Atrial septal defect
Atrial septal defect (ASD) is a congenital heart defect in which the wall that separates the upper heart chambers (atria) does not close completely. Congenital means the defect is present at birth.
www.uhseast.com