Interstage period: When a baby has hypoplastic left heart syndrome (HLHS), three surgeries are needed to fix the problems. The time between the first surgery and the second surgery is called the interstage period. During this period, careful daily monitoring of the baby's health is very important.

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Hypoplastic Left Heart Syndrome Surgery: The Fontan Procedure

The Fontan procedure is open-heart surgery done as the third of three surgeries to treat hypoplastic left heart syndrome (HLHS).

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Hypoplastic Left Heart Syndrome Surgery: The Glenn Procedure

The Glenn procedure is open-heart surgery done as the second of three surgeries to treat hypoplastic left heart syndrome (HLHS).

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Hypoplastic Left Heart Syndrome Surgery: The Norwood Procedure

The Norwood procedure is open-heart surgery done as the first of three surgeries to treat hypoplastic left heart syndrome (HLHS).

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Hypoplastic Left Heart Syndrome (HLHS)

Hypoplastic left heart syndrome (HLHS) is a birth defect of a baby’s heart. The left side of the heart doesn’t grow as it should, making it smaller and weaker than normal.

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