Congenital heart disease means you were born with a structural problem in your heart

Congenital heart disease (CHD) is a defect in the heart's structure that exists from birth. The heart may have a hole between chambers, valves that don't close properly, vessels that are narrowed or connected in the wrong place, or walls that are too thick. These structural problems happen while the fetus is developing in the womb, usually in the first eight weeks of pregnancy when the heart is forming.

The severity ranges widely. Some defects are so minor that a person lives their whole life without knowing they have one. Others are life-threatening and require surgery in infancy. Most fall somewhere in between—manageable with monitoring, medication, or a planned surgical repair at some point.

Congenital heart disease is the most common birth defect in the United States. It affects roughly 1 in 100 newborns, though not all of those will need treatment or experience symptoms.

Key Takeaways

  • Congenital heart disease is a structural problem in the heart present from birth, caused by how the heart develops in the womb.
  • Common defects include holes between heart chambers, narrowed vessels, misconnected vessels, and faulty valves.
  • Severity ranges from undetectable defects that cause no problems to life-threatening conditions requiring immediate surgery.
  • Some people with CHD have no symptoms and discover the condition by chance; others show signs like blue-tinged skin, shortness of breath, or poor feeding in infants.
  • Treatment depends on the type and severity of the defect and may include monitoring, medication, catheter procedures, or surgery.

How the heart normally develops and where things go wrong

During pregnancy, the heart begins as a simple tube and gradually divides into four chambers with valves and vessels. This process is mostly complete by week eight of pregnancy. If something disrupts this development—a genetic factor, a maternal infection, certain medications, or sometimes no identifiable cause—the heart may form incorrectly.

The exact reason a particular defect occurs is often unknown. Some congenital heart defects run in families, suggesting a genetic link. Others are associated with genetic conditions like Down syndrome or Turner syndrome. Maternal factors such as rubella infection during pregnancy, uncontrolled diabetes, or use of certain medications (like some seizure drugs) can increase the risk. In many cases, no clear cause is ever found.

Common types of congenital heart defects

Atrial septal defect (ASD) is a hole in the wall between the two upper chambers of the heart. Blood flows between them when it shouldn't, forcing the heart to work harder. Many people with small ASDs have no symptoms and may not need treatment.

Ventricular septal defect (VSD) is a hole in the wall between the two lower chambers. It's the most common congenital heart defect. Small holes may close on their own or cause no problems; larger ones require repair to prevent the heart from becoming enlarged and weakened.

Patent ductus arteriosus (PDA) occurs when a blood vessel that normally closes after birth stays open. This is especially common in premature infants and can be treated with medication or a catheter procedure.

Tetralogy of Fallot (TOF) is actually four defects occurring together: a hole between the ventricles, a narrowed pulmonary valve, a thickened right ventricle wall, and the aorta positioned over the hole instead of the left ventricle. It causes blue-tinged skin because oxygen-poor blood bypasses the lungs. Surgery is needed.

Transposition of the great arteries (TGA) means the two main vessels leaving the heart are switched—the aorta comes from the right ventricle and the pulmonary artery from the left. This is incompatible with life unless there is also a hole or open vessel allowing some mixing of oxygen-rich and oxygen-poor blood. Emergency surgery is required.

Coarctation of the aorta is a narrowing of the main artery leaving the heart. It restricts blood flow to the lower body and can lead to high blood pressure. Surgery or a catheter procedure can widen the vessel.

Signs and symptoms in infants and children

A newborn with a serious congenital heart defect may show signs within hours or days of birth. The most obvious is cyanosis—a blue or purple tint to the skin, lips, or fingernails caused by low oxygen in the blood. Other early signs include rapid or difficult breathing, poor feeding, failure to gain weight, excessive sweating, and unusual tiredness.

Some defects are detected before birth during a prenatal ultrasound. Others are found at the newborn screening exam in the hospital. A few are not discovered until later in childhood or even adulthood, when a doctor hears an unusual heart sound (a murmur) during a routine exam or the person reports symptoms like shortness of breath with exercise or chest pain.

In older children and adults, symptoms may include fatigue, difficulty keeping up with peers during physical activity, swelling in the legs or abdomen, or fainting. Some people have no symptoms at all and learn they have a defect only when being evaluated for an unrelated reason.

How congenital heart disease is diagnosed

Diagnosis usually begins with a physical exam and listening to the heart with a stethoscope. A doctor may hear a murmur—an abnormal sound caused by irregular blood flow. A chest X-ray can show whether the heart is enlarged or the lungs have extra fluid.

An echocardiogram (ultrasound of the heart) is the main tool for diagnosing congenital heart defects. It shows the heart's structure, how blood is flowing, and how well the chambers and valves are working. This test is painless and takes 20 to 40 minutes.

An electrocardiogram (EKG) records the heart's electrical activity and can show whether the heart rhythm is abnormal. For more detailed images, a cardiac MRI or CT scan may be ordered. In some cases, a cardiac catheterization—a procedure where a thin tube is threaded through a blood vessel to the heart—is used both to diagnose and sometimes to treat certain defects.

Treatment options depend on the type and severity of the defect

Not all congenital heart defects require treatment. Small holes that cause no symptoms may be monitored with regular checkups and echocardiograms to ensure they are not causing problems. If the defect closes on its own—which happens in some cases—no intervention is needed.

When treatment is necessary, options include medication to help the heart work more efficiently or to manage complications like high blood pressure or irregular heartbeat. Catheter-based procedures can close certain holes or widen narrowed vessels without open surgery. Open-heart surgery is used for more complex defects and involves repairing or reconstructing the abnormal structures.

The timing of surgery depends on the defect. Some babies need surgery within days of birth. Others can wait weeks or months while they grow stronger. Advances in surgical technique and care have made outcomes much better than they were decades ago, and many children born with serious congenital heart disease now reach adulthood.

Living with congenital heart disease as a child and adult

Children with congenital heart disease need regular follow-up care with a cardiologist to monitor their heart function and watch for complications. The frequency of visits depends on the severity of the defect and whether surgery was performed. Some children can participate in normal activities and sports; others may have restrictions on strenuous exercise.

As children with CHD reach adulthood, they transition to adult cardiologists who specialize in congenital heart disease. Ongoing monitoring is important because some defects or their repairs can cause problems later in life, such as irregular heartbeat, heart failure, or valve deterioration. Women with certain types of congenital heart disease need specialized care during pregnancy because pregnancy puts extra strain on the heart.

Many people with congenital heart disease live full, active lives. Others face ongoing limitations or need repeated procedures. The outlook depends on the specific defect, how well it was repaired, and how the heart functions over time.

Frequently Asked Questions

Can congenital heart disease be prevented?

Most congenital heart defects cannot be prevented because the cause is often unknown or genetic. However, pregnant people can reduce some risk factors by managing diabetes, avoiding certain medications, and protecting against infections like rubella. Prenatal vitamins with folic acid may lower risk slightly, though evidence is limited.

Is congenital heart disease hereditary?

Some types of congenital heart disease run in families, but most children born with CHD do not have a family history of it. If you have congenital heart disease and are planning to have children, genetic counseling can help you understand the risk to your children.

Can a person with congenital heart disease play sports?

It depends on the type and severity of the defect and how well the heart is functioning. Some people with CHD can participate in all sports; others need restrictions on strenuous activity. A cardiologist can advise on what is safe for each individual.

Will congenital heart disease get worse over time?

Some defects remain stable throughout life, while others can worsen or cause complications as a person ages. Regular monitoring with a cardiologist helps catch problems early. People who had surgery as children may develop issues with their repair years later and may need additional procedures.

What is the life expectancy for someone with congenital heart disease?

Life expectancy varies widely depending on the specific defect and its severity. Many people with congenital heart disease live into adulthood and have a normal or near-normal lifespan. Others face shorter lifespans or ongoing health challenges. Your cardiologist can discuss what to expect based on your individual situation.