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Hypoplastic Left Heart Syndrome (HLHS)

Hypoplastic left heart syndrome (HLHS) is a severe congenital heart defect in which the left side of the heart is underdeveloped or too small. 

When this condition occurs, the left side of the heart cannot pump oxygen-rich blood to the body properly.

HLHS is amongst the most severe forms of heart defect. Most babies are very ill in the early days of life and need urgent surgery to survive.

This video explains HLHS:

Learn more about hypoplastic left heart syndrome.

Royal Children's Hospital Melbourne Cincinnati Children's Hospital