Double Inlet Left Ventricle: Causes, Symptoms, and Treatment
Medically reviewed by Achuta Uppu, MD, Internal Medicine. Last reviewed: October 23, 2026.
What kind of doctor treats Double Inlet Left Ventricle?
A pediatric cardiologist, a heart doctor for children, usually leads care for double inlet left ventricle. A heart surgeon does the operations that the condition needs. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What is double inlet left ventricle?
Double inlet left ventricle (DILV) is a heart defect that is present from birth. Doctors call this a congenital heart defect. It affects the valves and chambers of the heart. A ventricle is a pumping chamber of the heart. Babies born with DILV have only one working ventricle.
DILV is one of several heart defects known as single ventricle defects. In DILV, only the left ventricle is developed. Both atria, the upper chambers of the heart, empty blood into it. So oxygen-rich blood mixes with oxygen-poor blood. This mixed blood is pumped to both the body and the lungs. DILV is very rare.
Symptoms
Symptoms depend mostly on the type and severity of other heart defects in the baby. Some babies show signs very early. Others show heart failure signs weeks or months after birth. Symptoms may include:
- Bluish color to the skin and lips, called cyanosis, from low oxygen in the blood.
- Poor weight gain, called faltering weight.
- Pale skin.
- Poor feeding because the baby tires easily.
- Sweating.
- Swollen legs or belly.
- Trouble breathing.
Doctors may also find a heart murmur, which is an extra sound in the heartbeat. Other signs include a fast heartbeat and fluid around the lungs.
Causes and who gets it
The exact cause of DILV is unknown. The problem most likely starts early in pregnancy, when the baby's heart is forming. DILV is very rare.
People with DILV often have other heart problems. These include coarctation of the aorta, which is a narrowing of the aorta, the main artery from the heart. They also include pulmonary atresia, where the pulmonary valve does not form properly, and pulmonary valve stenosis, which is a narrowing of that valve.
How doctors diagnose it
Some babies are found because of an abnormal ultrasound of the heart before birth. Others are found when a doctor hears a heart murmur in the newborn period. Some are found by pulse oximetry screening.
Tests to diagnose DILV may include:
- Chest x-ray.
- Electrocardiogram (ECG), which measures the electrical activity of the heart.
- Echocardiogram, an ultrasound exam of the heart.
- Cardiac catheterization, which passes a thin tube into the heart.
- Heart MRI.
Treatment
Surgery is needed to improve blood flow through the body and into the lungs. The most common treatment is a series of 2 to 3 operations. The first surgery may be needed when a baby is only a few days old.
The next surgery is called the bidirectional Glenn shunt or Hemifontan procedure. It is usually done when a child is 4 to 6 months old. The final step is the Fontan procedure. It is most often done when a child is 18 months to 3 years old. After it, the child is no longer blue.
The Fontan operation does not create normal circulation in the body. But it improves blood flow enough for the child to live and grow. Children may take medicines before and after surgery, such as blood thinners and water pills. A heart transplant may be recommended if these methods fail.
After treatment, many infants with DILV live to be adults. They need lifelong follow-up. They may face complications and may have to limit physical activity. Possible complications include frequent pneumonia, heart failure, and heart rhythm problems.
When to see a doctor
Contact your child's health care provider if your child tires easily. Also talk to your provider if your baby is not growing or gaining weight.
Call 911 or go to the emergency room if your child has blue or grey skin or lips, faints, is hard to wake up, or has trouble breathing.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. Either kind of doctor can help you keep track of follow-up visits and coordinate care with the heart specialists.
Common questions
Does a child with double inlet left ventricle need surgery?
Yes. Surgery is needed to improve blood flow through the body and into the lungs. The most common treatment is a series of 2 to 3 operations.
What is the Fontan procedure?
The Fontan procedure is the final step in the usual series of operations. It is most often done when a child is 18 months to 3 years old. It does not create normal circulation, but it improves blood flow enough for the child to live and grow.
Can people with double inlet left ventricle live to adulthood?
Yes, many can. After treatment, many infants with DILV live to be adults. They need lifelong follow-up visits.
Can double inlet left ventricle be prevented?
No. There is no known prevention.
Sources
- MedlinePlus - Double inlet left ventricle
- National Library of Medicine (PubMed Central) - Double-Inlet Left Ventricle
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
