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What is Hypoplastic Left Heart Syndrome (HLHS)?

A child born with a rare cardiac condition is known as hypoplastic left heart syndrome (HLHS). It is, therefore, a congenital cardiac defect. In this condition, the left half of the heart is underdeveloped and undersized. Thus, its blood-pumping ability is poor. Instead, blood must be pumped to the lungs and the rest of the body by the right side of the heart, causing severe breathing problems.

What can I expect if my child has hypoplastic left heart syndrome?

Your child will require follow-up appointments with a cardiologist (heart doctor) at least once a year for the rest of their life. These checkups guarantee that their lungs, hearts, and other organs still function correctly. An adult congenital heart disease expert will treat your child once they reach adulthood.

The majority of kids with hypoplastic left heart syndrome will require cardiac medications. Antibiotics must also be taken before any other procedures, including dental procedures. These medications decrease the risk of endocarditis or heart infection.

What are the Common Symptoms of Hypoplastic Left Heart Syndrome (HLHS)?

Cyanosis is a darkening of the skin, lips, and nails that can be grayish for dark-skinned persons or bluish for light-skinned people.

  • Having trouble breathing.
  • Feeding difficulties.
  • Lethargy, or a lack of vitality.
  • Fast heartbeat.
  • Cold, sweaty, or clammy skin.
  • Weak heartbeat.

If left untreated, this disease might cause a newborn to go into shock.

  • Shock symptoms include cold, clammy skin that may be pale, gray, or blue lips.
  • A weak and rapid pulse.
  • Breathing, which could be shallow and slow or extremely fast.
  • Dull eyes.

Causes, Risk Factors and Complications of Hypoplastic Left Heart Syndrome (HLHS)

Causes

  • A baby's left side of the heart may not fully grow during pregnancy, leading to hypoplastic left heart syndrome (HLHS), which impairs the heart's ability to pump blood to the body.
  • The aorta, left ventricle, and aortic and mitral valves are all impacted by this illness. The ductus arteriosus and foramen ovale allow the right side to pump blood to the body and lungs after birth.
  • Babies with HLHS need medicine to keep their blood flowing until heart surgery since their left side has trouble pumping blood.

Risk Factors

  • The likelihood of having another kid with hypoplastic left heart syndrome (HLHS) or a related condition is increased for those who have a child with this ailment.

Complications

HLHS complications might include:

  • Getting tired more quickly while exercising or playing sports
  • Arrhythmias (irregular heartbeats)
  • Edema is a fluid buildup in the legs, feet, stomach, and lungs
  • Not developing properly
  • Conditions relating to brain and nervous system development
  • More heart surgery or a heart transplant is required

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Latest Research and Technologies in the Treatment of Hypoplastic Left Heart Syndrome (HLHS) in India

  • According to the National Institutes of Health (NIH), recent developments through clinical trials of Stem-cell-based therapies have shown great potential in treating congenital heart diseases like HLHS.

Hypoplastic Left Heart Syndrome (HLHS) Prevention Tips

A lot of HLHS instances lack a clear cause. Nonetheless, healthcare professionals always advise healthy practices throughout pregnancy, such as

  • Avoid smoking and alcohol.
  • Taking care of any illnesses, including diabetes.
  • Consuming a nutritious diet.
  • Taking folic acid as a daily prenatal vitamin

Treatment options for Hypoplastic Left Heart Syndrome (HLHS)

Norwood procedure: The Norwood procedure is a heart surgery performed in the first two weeks of life. It involves rebuilding the aorta, connecting it to the heart, and adding a shunt for the lungs.


Cost Start From USD 10000 - USD 12000Explore Options

Fontan procedure: The Fontan procedure, typically performed in children aged 3-4, involves creating a pathway for oxygen-poor blood to flow directly into the pulmonary arteries, resulting in minimal mixing of oxygen-rich and oxygen-poor blood in the heart.


Cost Start From USD 5000 - USD 9000Explore Options

Heart transplant: A heart transplant is necessary for many infants with hypoplastic left heart syndrome. To prevent their bodies from rejecting the donor's heart, children who have heart transplants must take medications for the rest of their lives.


Cost Start From USD 55000 - USD 65000Explore Options

  • Prenatal Diagnosis:
    • Pregnancy ultrasound: If the infant has HLHS, it may usually be determined by a routine ultrasound examination performed during the second trimester of pregnancy.
  • Postnatal Diagnosis:
    • Echocardiogram: This test creates images of the heart using sound waves.
    • Chest X-ray: An X-ray of your baby's chest can reveal the size and form of their heart and lungs.
    • Electrocardiogram (EKG): A heartbeat's electrical alterations are measured by EKG.
    • Pulse oximetry screening: Measures the amount of oxygen in your baby's blood.

A baby with hypoplastic left heart syndrome may receive medication and undergo the following therapies while awaiting surgery or a heart transplant:

  • Breathing help: A ventilator is breathing equipment that can help babies with breathing problems.
  • Feeding tube: A feeding tube can feed babies who struggle to eat or get tired while eating.
  • The ductus arteriosus is kept open by the medication. It typically closes in all babies soon after birth. However, the ductus must remain open in infants with hypoplastic left heart syndrome for blood to flow to the rest of the body.

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Hospitals for Hypoplastic Left Heart Syndrome (HLHS) in India

The Medical Park: Top Doctors, and Reviews
The Medical Park

Chennai, India

The Medical Park, located in the heart of Chennai, is a leading one-stop wellness and aesthetic surgery center, specializing in both surgical and non-surgical treatments. With over 25 years of expertise in aesthetic procedures, The Medical Park is renowned for its commitment to providing high-quality, patient-centric care. The clinic offers a wide range of services designed to promote overall health, rejuvenation, and well-being, combining state-of-the-art facilities with advanced medical technology.

The Medical Park in Chennai is a premier healthcare and wellness facility that offers a comprehensive range of services designed to promote overall well-being. Combining state-of-the-art medical treatments with a holistic approach to health, their clinic provides a one-stop solution for those seeking aesthetic procedures, wellness programs, and mental health support. The Wellness Centre is equipped with the latest fitness technologies and staffed by highly trained professionals.

Manipal Hospital, Dwarka: Top Doctors, and Reviews
Manipal Hospital, Dwarka

Delhi, India

Manipal Hospital Dwarka is a leading multi-super speciality tertiary care hospital offering world-class, affordable, and accessible healthcare. Backed by renowned doctors, advanced technology, and global standards in clinical care, the hospital provides comprehensive preventive, diagnostic, and therapeutic services for all age groups. With 380 beds, 13 modular OTs, 118 critical care beds, and 24/7 emergency services, it combines excellence in patient care with innovations like AI, telemedicine, remote monitoring, and EMR—striving to become a fully digital, paperless hospital setting new standards in modern healthcare.

Dr. Rela Institute and Medical Centre: Top Doctors, and Reviews
Dr. Rela Institute and Medical Centre

Chennai, India

The mega-structure of RIMC serves as a hospital as well as an educational institute. Hence, it offers a huge array of medical services and facilities to cater to the needs of its patients.

Fertility Services - RIMC specializes in both male and female fertility and in procedures like IntraCytoplasmic Sperm Injection (ICSI), Uterine Transplants, Preimplantation genetics and Laser Assisted Hatching (LAH).

Anaesthesia and ICU - The ICU rooms in RIMC are equipped to serve the individual needs of every patient. They boast the largest liver transplant ICU in India and a specific ICU dedicated to pediatrics multi-organ transplants.

Radiology and Imaging Sciences - RIMC has the infrastructure to support high-quality scans including 128 Slice CT, Cardiac MRI, and 3 Tesla MRIs.

Blood Bank and Transfusion Medicine - RIMC has an active blood bank system with facilities dedicated to Blood Component Separation and Therapy. They use high-end technology like the Automated 1H500 Analyser and have a separate Therapeutic Apheresis Unit.

Advanced Endoscopy - Dr. Rela Institute and Medical Centre has one of the most advanced hospital facilities with an individual healthcare unit specifically dedicated to Endoscopy. Advanced procedures like Spyglass Cholangioscopy, Laser therapy, Endoscopic Ultrasound, Capsule Endoscopy, and special ERCP and EUS Suite.

Some of the other healthcare facilities, departments, and services offered by Dr. Rela Institute and Medical Healthcare are listed below:

  • Orthopaedics
  • Obstetrics and Gynaecology
  • Reproductive Medicine
  • Hepatology
  • Cardiology
  • Internal Medicine and Diabetology
  • Advanced Paediatrics
  • Ear Nose and Throat 
  • Emergency Medicine
  • Interventional Radiology and Imaging Services
  • Neonatology
  • Neurology
  • Liver Disease and Transplantation
  • Gastroenterology
  • Medical Oncology
  • Nephrology
  • Neonatology
  • Pathology
  • Ophthalmology
  • Plastic and Reconstructive Surgery
  • Radiation Oncology
  • Pulmonary Medicine
  • Urology
  • Surgical Oncology
  • Transfusion Medicine

Apart from these facilities, Dr. Rela Institute and Medical Centre also have a preventive health check lounge, 72 consultation suites, and 360 degrees including lab facilities specifically for outpatients. 

Visit Dr. Rela Institute and Medical Centre in Chromepet, Chennai today and find the best care for you and your loved ones.

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Why Choose India for Hypoplastic Left Heart Syndrome (HLHS) Treatment?

Here are some of the reasons for choosing India:

  • Due to advancements in medical facilities, such as minimally invasive surgical techniques.
  • World-class experts include highly experienced doctors, JCI, and NABH-accredited healthcare institutions.
  • Compared to other countries, treatment in Indian hospitals is cost-effective.
  • Indian hospitals provide International patient services, including a multilingual support system.
  • Improved treatment methods and biological therapies.

Frequently Asked Questions

Yes, some surgeries, such as the Norwood and Fontan procedures, can be used to treat hypoplastic left heart syndrome (HLHS); nevertheless, lifetime care and monitoring are frequently needed. A heart transplant may be required in certain circumstances.

With skilled pediatric cardiac surgeons and cutting-edge medical technology, India has demonstrated significant success rates in treating HLHS. The nation's healthcare institutions offer top-notch treatment alternatives, guaranteeing successful outcomes for many patients.

Yes, many Indian hospitals offer the following for HLHS treatment:

  • Advanced diagnostic tools like echocardiography and MRI for accurate heart assessments.
  • Skilled pediatric cardiologists and cardiac surgeons for congenital heart defects.
  • Advanced surgeries, such as the Norwood and Fontan procedures.
  • Comprehensive post-surgery care and follow-up to ensure long-term heart health.

Always consider the following factors when selecting Indian hospitals:

  • Hospitals that are accredited (authorised by JCI and NABH).
  • Patient reviews and success rates.
  • Hospitals that provide seamless care to patients from abroad.

In general, HLHS treatment in India has a high success rate; survival rates for significant procedures like Fontan and Norwood range from 70% to 85%. Top hospitals offer specialised knowledge and cutting-edge care.

HLHS can occasionally be detected while the infant is still in the womb during a routine ultrasound. A heart ultrasound, often known as an echocardiogram, or other testing can be performed after birth to confirm the diagnosis.

Although every child's experience is unique, many children with HLHS grow up healthy, though they may require lifelong medical care and cardiac care. Even though they may have heart health or activity issues, some people can still lead normal lives.

Hypoplastic left heart condition cannot be treated by surgery during pregnancy. A fetal surgeon may decide to perform surgery just to treat specific problems that may be linked to poor outcomes for HLHS or in infants who are developing HLHS.

Here are some ways you can take care of your child:

  • Every six months or annually, take your child to see a cardiologist.
  • Ensure that your child takes the prescribed medications.
  • According to the healthcare expert, limit your child's vigorous physical exercise.

Author

Nimra Haseeb
Nimra Haseeb

MSc Biochemistry

4 Years of Experience

Miss Nimra Haseeb is a medical researcher and a scientific content writer. She holds a Bachelor’s degree in Biotechnology and a Master’s in Biochemistry from Integral University, Lucknow. With strong experience in healthcare research, she specializes in secondary research, clinical data analysis, and evidence-based medical writing. Her work focuses on transforming complex scientific and medical information into clear, accurate, and reliable healthcare content for patients and healthcare audiences. She is also experienced in interpreting medical studies and healthcare trends to deliver well-researched and informative content that supports better health awareness and decision-making. View More

Reviewer

Dr. Akash Khandelwal
Dr. Akash Khandelwal

Hematologist

9 Years of Experience

Dr. Akash Khandelwal is a distinguished Hematologist, Hemato-oncologist, and Bone Marrow Transplant (BMT) Physician with extensive training from the prestigious AIIMS New Delhi. His expertise encompasses a wide range of specialized techniques in bone marrow transplantation, including autologous and allogeneic transplants such as matched sibling donors, matched unrelated donors (MUD), and haploidentical donor transplants. Dr. Khandelwal has personally supervised and conducted over 100 bone marrow transplants. View More

Last Reviewed - January 2026