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► Single Ventricle Heart Defects (SVD)

Single Ventricle Heart Defects (SVD)

Also known as: single ventricle defect, SVD, hypoplastic left heart syndrome (HLHS), double outlet left ventricle (DOLV), tricuspid atresia

What are Single Ventricle Heart Defects?

The ventricles are two of the heart’s four chambers (the other two are called atria). The ventricles are responsible for pumping blood out of the heart. When one of the ventricles has a problem, this is a single ventricle heart defect. It might be a ventricle that’s missing a valve, or one that’s not developed fully.

What causes single ventricle heart defects? 

These are heart defects that are present at birth. The exact cause is not known. Single ventricle heart defects are often present with other congenital heart defects.

What are the symptoms of single ventricle heart defects? 

The reduction in blood flow caused by single ventricle heart defects typically leads to extreme fatigue or even unresponsiveness. The baby usually has trouble breathing and feeding, and may have a blue tint to the skin or lips that indicates low oxygen levels.

What are single ventricle heart defects care options? 

These are often serious heart defects that require surgical intervention shortly after birth.

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