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atrial septal defect

A hole in the wall between the two upper chambers of the heart.

AY-tree-ul SEP-tul DEE-fekt noun

Word parts

What it means

A heart defect present at birth in which an opening in the septum (the wall) between the right and left atria lets blood flow from the left side to the right. Extra blood then goes to the lungs. Small holes may close on their own and cause no symptoms; larger ones can cause a heart murmur, tiring easily and, over years, heart failure. Many are closed with a device placed through a catheter or by surgery.

For the nurse

In an infant or child, listen for a murmur and watch feeding, weight gain and breathing effort. Teach families what to expect before and after closure.

At a glance

AbbreviationsASD (also used for autism spectrum disorder; write the words out)
Spanishcomunicación interauricular
Also writtenatrial septal defects

Related terms

-al

A word ending that means relating to or belonging to.

heart failure

A long-term condition in which the heart cannot pump enough blood to meet the body's needs.

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