14789 Tricuspid Atresia

Overview

Tricuspid atresia is a heart condition that babies are born with. In this condition, the tricuspid valve — the one-way opening between the upper and lower chambers on the right side of the heart — does not form normally. Instead of allowing blood to flow from the right atrium to the right ventricle, a solid sheet of tissue blocks the opening. This means the right ventricle is often too small, and blood cannot reach the lungs to get oxygen properly.

Rare. About 1 in every 10,000 to 15,000 babies is born with tricuspid atresia.

It affects boys and girls equally. It happens during early heart development in the womb, and most children are diagnosed in the first weeks or months of life. In some cases, it is detected during pregnancy.

Symptoms

Common symptoms

• Blue or purple tint to the lips, skin, or nail beds (cyanosis)
• Fast or difficult breathing
• Poor feeding and slow weight gain
• Tiredness or low energy
• A heart murmur (extra or unusual heart sound)

Symptoms in children

• Trouble feeding, getting breathless while breastfeeding or bottle-feeding
• Poor weight gain
• Sweating during feeds
• Irritability or being less active than other babies

Symptoms in older adults

• Irregular heartbeat (palpitations)
• Swelling in the legs or belly from fluid buildup
• Shortness of breath with activity
• Feeling very tired

Causes

Main causes

• The exact cause is not known. The heart does not form correctly in the first eight weeks of pregnancy, and the tricuspid valve fails to develop properly. Most cases happen without a clear reason.

Risk factors

• A family history of congenital heart defects
• Certain chromosome changes (such as Down syndrome)
• Health conditions during pregnancy, such as poorly controlled diabetes
• Use of certain medicines or tobacco/alcohol during early pregnancy

When to see a doctor

See a doctor urgently if:

• If your baby has any of the emergency or urgent symptoms listed above, take them to the nearest A&E or call your local emergency number.

Book a routine appointment if:

• Visit your GP or health visitor if your baby is feeding poorly, not gaining weight, or seems very tired.
• If you know your child has tricuspid atresia, attend all scheduled appointments with the heart specialist.

Diagnosis

Doctors may suspect tricuspid atresia during a routine pregnancy ultrasound, or after birth when a baby shows signs of low oxygen. A specialist heart doctor (pediatric cardiologist) will do tests to look at the heart's structure.

Tests that may be done

• Echocardiogram (heart ultrasound)
• Pulse oximetry (oxygen level test)
• Chest X-ray
• Electrocardiogram (ECG) — a test of the heart's electrical activity
• Cardiac catheterization — a thin tube inserted into the heart to measure blood flow and pressure

What to expect at your appointment

These tests are usually painless and many can be done without surgery. Some, like an echocardiogram, are similar to an ultrasound picture of the heart. Others, like cardiac catheterization, require a short hospital stay. The doctor will explain the results and recommend the next steps.

Treatment

Tricuspid atresia cannot be fixed with medicine alone. It requires surgery to reroute the heart and allow blood to get enough oxygen. Surgery is usually done in stages, starting in infancy.

Self-care at home

• Keep all follow-up appointments with your heart specialist.
• Give any prescribed medicines exactly as directed by your doctor.
• Tell school staff, coaches, and other caregivers about your child's condition.
• Practise good tooth brushing and preventive dental care, because heart health is linked to gum health.
• Ask your doctor about safe levels of physical activity.

Medical treatments

Before surgery, doctors may use medicines to help the baby breathe, feed, and keep oxygen levels stable. After surgery, medicines may be used to prevent infection, manage heart rhythm, or reduce fluid retention. These medicines must never be adjusted without a doctor's advice. Some children may need a feeding tube for a while, and a temporary catheter procedure may be done to keep a blood vessel open.

When is surgery considered?

Most babies need surgery soon after birth or within the first months. The first stage creates a way for blood to reach the lungs. A later stage, sometimes called the Fontan procedure, reroutes most of the blood so the heart works more effectively with one pumping chamber. Many children have several operations over the first few years of life.

Living with this condition

With modern care, many children with tricuspid atresia go to school, play, and enjoy their childhood. However, they will always need regular checkups with a heart specialist and may need to adapt some activities. Protecting your child from infections is important — practise good handwashing and keep up with vaccinations.

Lifestyle tips

• Keep your home smoke-free.
• Encourage moderate activity and let your child take breaks when tired.
• Avoid very competitive or very strenuous exercise unless cleared by the doctor.
• Travel only with medical advice and carry a summary of your child's heart care.
• Maintain a calm, open routine to reduce stress.

Diet and exercise

A normal, balanced diet is usually best unless the specialist advises changes. Some children may need extra calories because feeding can be tiring. Exercise is good, but it should match what the heart can do. Always ask the cardiologist before a child starts a new sport or heavy exercise routine.

Mental health and emotional wellbeing

Living with a serious congenital heart condition can bring worry, fear, and stress for both the child and the family. It is normal to have emotional ups and downs. Talk with your care team if you or your child feels anxious or overwhelmed. If you're ever in crisis, reach out to a local mental health support line or your doctor.

Prevention

Tricuspid atresia cannot be prevented. It begins very early in pregnancy, before most women know they are pregnant. You can reduce some risks by attending regular prenatal care, managing diabetes, staying healthy, and avoiding tobacco, alcohol, and unnecessary medicines during pregnancy.

Vaccines

Make sure your child receives all routine childhood vaccinations, including the flu vaccine if recommended. Always tell the vaccination team about your child's heart condition so any vaccine can be given safely.

Screening programmes

Prenatal ultrasound (usually around 18 to 22 weeks) can sometimes detect tricuspid atresia, but not always. After birth, pulse oximetry screening measures oxygen levels and can pick up some serious heart defects.

Complications

If left untreated

• Low oxygen levels that can damage organs
• Heart failure
• Irregular heart rhythms (arrhythmias)
• Stroke
• Poor growth and development
• Life-threatening illness in infancy

Long-term outlook

The outlook is far better than in the past. With today's surgery and careful long-term follow-up, most children with tricuspid atresia survive into adulthood and lead meaningful, active lives. They will need lifelong cardiac care, but they can still achieve most life goals — going to school, having relationships, and building a career. Hope is very real.

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