14733 Double Outlet Right Ventricle

Overview

Double outlet right ventricle (DORV) is a heart defect that a baby is born with. In a normal heart, the aorta (the main artery carrying oxygen-rich blood to the body) comes from the left ventricle, and the pulmonary artery (which carries oxygen-poor blood to the lungs) comes from the right ventricle. In DORV, both of these arteries are connected to the right ventricle instead of their usual places. This can cause oxygen-poor blood and oxygen-rich blood to mix, and the body may not receive enough oxygen.

No. Double outlet right ventricle is rare. It affects about 1 to 3 out of every 10,000 babies born, making up around 1–3% of all congenital heart defects.

DORV affects unborn and newborn babies. It is sometimes seen in children who also have other heart problems, such as a ventricular septal defect (a hole between the two lower heart chambers). It can occur in any family and is slightly more common in children with certain genetic conditions, such as Down syndrome.

Symptoms

Common symptoms

• Bluish color of the lips, skin, or nails (cyanosis), due to low oxygen levels
• Fast breathing or difficulty breathing
• Poor feeding and failure to gain weight
• Tiredness and lack of energy
• Heart murmur (an extra or unusual sound heard through a stethoscope)

Symptoms in children

• Slow growth compared to other children their age
• Shortness of breath during feeding, crying, or mild activity
• Frequent chest infections or colds
• Being less active or getting tired more quickly than peers

Symptoms in older adults

• This condition is almost always repaired in infancy or childhood, so older adults with DORV are rare. If the defect was not fully repaired, they may experience ongoing fatigue, shortness of breath on exertion, and abnormal heart rhythms.

Causes

Main causes

• The exact cause of DORV is not fully understood. It happens early in pregnancy when the baby's heart is forming, and the large arteries do not attach to the correct pumping chambers.
• A combination of genetic and environmental factors is thought to play a role.

Risk factors

• A family history of congenital heart disease
• Maternal diabetes, especially if not well controlled during pregnancy
• Certain infections during pregnancy, such as rubella
• Some genetic conditions, like DiGeorge syndrome or Down syndrome

When to see a doctor

See a doctor urgently if:

• If your baby has any emergency symptoms listed above, call your local emergency number immediately.
• If your child has any urgent symptoms, contact your healthcare provider or go to the nearest urgent care centre the same day.

Book a routine appointment if:

• If your child is not growing well or seems less energetic than expected, book a check-up with your doctor.
• If you notice a heart murmur or have any concerns after a heart surgery follow-up, tell your cardiologist.

Diagnosis

DORV is often seen on a prenatal ultrasound as early as 18–22 weeks of pregnancy. After birth, a doctor may suspect it after hearing a heart murmur, seeing low oxygen readings, or noticing bluish skin. The most common confirmatory test is an echocardiogram — an ultrasound of the heart — which shows the heart's structure and blood flow.

Tests that may be done

• Echocardiogram (ultrasound of the heart) — the main imaging test for DORV
• Pulse oximetry — a small sensor on the finger or foot that measures oxygen levels
• Chest X-ray — to see the size and shape of the heart and lungs
• Electrocardiogram (ECG) — to check the heart's electrical rhythm
• Cardiac catheterisation — a thin tube inserted into a blood vessel to measure pressures and take detailed images (sometimes needed before surgery)
• MRI scan — sometimes used for detailed pictures of the heart

What to expect at your appointment

If DORV is suspected, you will be referred to a paediatric cardiologist (a heart specialist for children). They will carry out a thorough evaluation, explain the exact anatomy of your baby's heart, and discuss treatment options. This can be an anxious time, but the care team will guide you step by step and answer all your questions.

Treatment

Surgery is the main treatment for DORV. The type and timing of surgery depend on the exact anatomy of the heart — for example, the position of the hole between the heart chambers and how the arteries are connected. Medicines may help control symptoms before surgery, but they do not correct the defect. After surgery, many children need long-term follow-up with a heart specialist.

Self-care at home

• Give all medicines exactly as prescribed by the cardiologist.
• Attend all scheduled follow-up appointments, including heart scans and ECGs.
• Keep a record of your child's growth and energy levels to share with the care team.
• Protect against infections — remind doctors and dentists about the heart condition before any procedure.

Medical treatments

Medicines may be used to help the heart pump more effectively, reduce fluid build-up (diuretics), or keep blood flowing well through the lungs. Some babies need a medicine called prostaglandin right after birth to keep a certain blood vessel open until surgery is possible. These decisions are always made by the specialist team based on the individual child. Never change or stop medicines without talking to your healthcare provider.

When is surgery considered?

Most babies with DORV undergo surgery in the first year of life, often before 3 months of age. The goal is to reroute blood flow so that oxygen-rich blood goes to the body and oxygen-poor blood goes to the lungs. The exact procedure varies: in some cases, only a patch is needed; in others, a more complex repair or a temporary operation is required before a complete repair.

Living with this condition

After successful surgery, many children with DORV live active, normal lives. Day-to-day care involves regular cardiology visits, monitoring growth and energy levels, and giving medicines as prescribed. Some children may need to take antibiotics before certain dental visits to prevent heart infections. Always ask your specialist for specific guidance.

Lifestyle tips

• Encourage healthy sleep and regular routines.
• Follow the cardiologist's advice about physical activity — many children can play sports, while some may need restrictions for certain exercises.
• Avoid exposure to cigarette smoke, which is harmful for the heart and lungs.
• Keep up with all recommended vaccinations, including the yearly flu jab.

Diet and exercise

A balanced diet is important for heart health. Babies may need extra calories if they are struggling to gain weight. Older children should eat plenty of fruits, vegetables, whole grains, and lean proteins. Exercise is encouraged for most children with repaired DORV, but always follow your heart team's advice. They will tell you which activities are safe and whether any restrictions apply.

Mental health and emotional wellbeing

Growing up with a heart condition — or caring for a child who has one — can bring stress, worry, or sadness. It is completely normal to feel this way. Parents often worry about surgeries and long-term outcomes. Older children may feel different from their peers. Talking to a counsellor, psychologist, or a trusted healthcare professional can help build coping skills and emotional resilience.

Prevention

In most cases, DORV cannot be prevented because it happens during the early development of the baby. However, you can reduce some risks by managing chronic conditions like diabetes before and during pregnancy, taking prenatal vitamins with folic acid, and avoiding harmful substances like alcohol and tobacco.

Vaccines

Keeping vaccinations up to date helps prevent infections that could put extra strain on the heart. This is especially important for children with DORV, even after surgery. Talk to your doctor about the recommended vaccination schedule, including the flu vaccine.

Screening programmes

Routine prenatal ultrasound can often spot DORV before birth. After birth, newborn screening (pulse oximetry) measures oxygen levels and can detect some heart defects early. If there is a family history of congenital heart disease, a prenatal specialist may recommend a more detailed fetal echocardiogram.

Complications

If left untreated

• Heart failure — the heart struggles to pump enough oxygen-rich blood to the body
• Pulmonary hypertension — high blood pressure in the lungs due to too much blood flowing there
• Irregular heart rhythms (arrhythmias)
• Badly slowed growth and development
• Increased risk of lung infections

Long-term outlook

Thanks to advances in surgery, the outlook for babies born with DORV is very promising. Most children who have surgical repair go on to lead full, active lives. They will need lifelong regular check-ups with a heart specialist, but many attend school, play sports, and grow up to have families of their own. Your medical team will be with you at every stage, so you never have to face this alone.

Find support

External links open third-party websites. Ruqelo Health is not responsible for external content. Listing an organisation does not imply endorsement.