Hypoplastic left heart syndrome (HLHS) is a problem that happens when the left side of a baby’s heart doesn't form as it should. It’s smaller than normal and can’t pump enough blood to the body. After the baby is born, doctors can treat the problem with medicines and several surgeries. Some babies will need a heart transplant.
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Reviewed by: KidsHealth Medical Experts
Date Reviewed: Jan 5, 2022
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