Babies born with hypoplastic left heart syndrome usually are seriously ill immediately after birth. Hypoplastic left heart syndrome symptoms include:

  • Grayish-blue skin color (cyanosis)
  • Rapid, difficult breathing
  • Poor feeding
  • Cold hands and feet
  • Being unusually drowsy or inactive

In a baby with hypoplastic left heart syndrome, if the natural connections between the heart's left and right sides (foramen ovale and ductus arteriosus) are allowed to close, he or she may go into shock and may die. Signs of shock include:

  • Cool, clammy skin that may be pale or gray
  • A weak and rapid pulse
  • Abnormal breathing that may be either slow and shallow or very rapid
  • Dilated pupils
  • Lackluster eyes that seem to stare

A baby who is in shock may be conscious or unconscious. If you suspect your baby is in shock, immediately call 911 or your local emergency number.

When to see a doctor

It's more likely that your baby would be diagnosed with hypoplastic left heart syndrome either before birth or soon after. However, you should seek medical help if you notice that your baby has the following symptoms:

  • Grayish-blue skin color
  • Rapid, difficult breathing
  • Poor feeding
  • Cold hands and feet
  • Being unusually drowsy or inactive

If your baby has any of the following signs of shock, call 911 or your local emergency number right away:

  • Cool, clammy skin that may be pale or gray
  • A weak and rapid pulse
  • Abnormal breathing that may be either slow and shallow or very rapid
  • Dilated pupils in the eyes
  • Lackluster eyes that seem to stare
Aug. 24, 2012

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