- Parents Home
- Para Padres
- A to Z Dictionary
- Allergy Center
- Asthma
- Cancer
- Diabetes
- Diseases & Conditions
- Doctors & Hospitals
- Emotions & Behavior
- First Aid & Safety
- Flu (Influenza)
- Food Allergies
- General Health
- Growth & Development
- Heart Health & Conditions
- Homework Help Center
- Infections
- Newborn Care
- Nutrition & Fitness
- Play & Learn
- Pregnancy Center
- Preventing Premature Birth
- Q&A
- School & Family Life
- Sports Medicine
- Teens Home
- Para Adolescentes
- Asthma
- Be Your Best Self
- Body & Skin Care
- Cancer
- Diabetes
- Diseases & Conditions
- Drugs & Alcohol
- Flu (Influenza)
- Homework Help
- Infections
- Managing Your Weight
- Medical Care 101
- Mental Health
- Nutrition & Fitness
- Q&A
- Safety & First Aid
- School, Jobs, & Friends
- Sexual Health
- Sports Medicine
- Stress & Coping
What's Hypoplastic Left Heart Syndrome (HLHS)? (Video)
What's Hypoplastic Left Heart Syndrome (HLHS)?
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.

90 Second Summary: Hypoplastic Left Heart Syndrome
Learn the basics in 90 seconds.
Note: All information is for educational purposes only. For specific medical advice,
diagnoses, and treatment, consult your doctor.
© 1995- The Nemours Foundation. KidsHealth® is a registered trademark of The Nemours Foundation. All rights reserved.
Images sourced by The Nemours Foundation and Getty Images.


