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Adult Congenital Heart Disease: What It Is, How It's Diagnosed, and Why Lifelong Follow-Up Matters

Writer: Dr. Baraa Alnahhal
Dr. Baraa Alnahhal
7 days ago
11 min read

Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026

Quick Answer

Adult congenital heart disease is a structural heart problem present at birth that may go unnoticed until adulthood or resurface years after childhood repair. Common symptoms include arrhythmias, shortness of breath, rapid fatigue with activity, swelling from fluid buildup, and blue or gray skin from low oxygen. Diagnosis involves tests such as an ECG, echocardiogram, and cardiac catheterization, and treatment may include checkups alone, medications, implantable devices, catheter procedures, or surgery. Lifelong follow-up care with a congenital cardiologist is key to preventing complications.

What the research says

  • Many adults with congenital heart disease go years without cardiology care. In a survey of 922 adults at 12 centers, 42% had a gap in cardiology care longer than 3 years. Common reasons were feeling well and being unaware that follow-up was required, and gaps were reported by 59% of people with mild disease, 42% with moderate disease, and 26% with severe disease. (Gurvitz et al., Journal of the American College of Cardiology, 2013)

  • A transition clinic reduced loss to follow-up. Among adolescents and young adults with congenital heart disease, 7.3% of 53 clinic participants were lost to follow-up compared with 25.9% of controls (p < 0.01). (Gaydos et al., Cardiology in the Young, 2020)

What Is Adult Congenital Heart Disease?

Congenital heart disease is one or more problems with the heart's structure that are present at birth. The word congenital means that you are born with the condition. A congenital heart condition can change the way blood flows through the heart.

There are many different types of congenital heart defects, including atrial septal defect (ASD), ventricular septal defect (VSD), tetralogy of Fallot, transposition of the great arteries, patent ductus arteriosus (PDA), bicuspid aortic valve, coarctation of the aorta, and Ebstein anomaly, among many others. Some types of congenital heart disease may be mild. Others may cause life-threatening complications.

Advances in diagnosis and treatment have improved survival for those born with a heart problem, which means more and more people with these conditions are living into adulthood. Treatment for congenital heart disease may include regular health checkups, medicines, or surgery. If you have adult congenital heart disease, ask your healthcare professional how often you need a checkup.

Key point: a repaired heart defect in childhood does not always mean the condition is “cured” — some defects need no repair until adulthood, and symptoms can return years after treatment.

How a healthy heart is supposed to work

A typical heart has two upper and two lower chambers. The upper chambers, the right and left atria, receive incoming blood. The lower chambers, the more muscular right and left ventricles, pump blood out of the heart. The heart valves, which keep blood flowing in the right direction, act as gates at the chamber openings. Congenital heart disease involves problems in this structure that disrupt normal blood flow.

Signs and Symptoms

Some people born with a heart problem do not notice symptoms until later in life. Symptoms also may return years after a congenital heart defect is treated.

Symptom

What it involves

Arrhythmias

Irregular heartbeats

Color changes

Blue or gray skin, lips, and fingernails due to low oxygen levels — depending on skin color, these changes may be harder or easier to see

Breathlessness

Shortness of breath

Fast fatigue

Feeling tired very quickly with activity

Swelling

Fluid collecting inside body tissues, called edema

When to see a doctor

Get emergency medical help if you have unexplained chest pain or shortness of breath.

Make an appointment for a health checkup if you have symptoms of adult congenital heart disease, or if you received treatment for a congenital heart defect as a child.

Five common symptoms of adult congenital heart disease: arrhythmia, blue-gray color changes, shortness of breath, fast fatigue, and swelling

What Causes Congenital Heart Disease?

Researchers are not sure what causes most types of congenital heart disease. They think that gene changes, certain medicines or health conditions, and environmental or lifestyle factors, such as smoking, may play a role.

Risk Factors

Several factors can raise the risk of a child being born with a congenital heart defect.

Risk factor

How it contributes

Genetics

Congenital heart disease appears to run in families, meaning it is inherited. Gene changes have been linked to heart problems present at birth. People with Down syndrome, for example, are often born with heart conditions

Rubella (German measles)

Having rubella during pregnancy may affect how the baby's heart grows in the womb. A blood test before pregnancy can check rubella immunity, and a vaccine is available for those who are not immune

Diabetes

Type 1 or type 2 diabetes during pregnancy may change how the baby's heart grows. Gestational diabetes generally does not increase the risk

Medicines

Certain medicines during pregnancy can cause congenital heart disease and other birth problems, including lithium (Lithobid) for bipolar disorder and isotretinoin (Claravis, Myorisan, others) for acne. Always tell your healthcare team about the medicines you take

Alcohol

Drinking alcohol while pregnant has been linked to heart conditions in the baby

Smoking

Smoking during pregnancy increases the risk of congenital heart defects in the baby

Possible Complications

Complications of congenital heart disease may occur years after the heart condition is treated.

Complication

What happens

Arrhythmias

Scar tissue from surgeries to fix a congenital heart condition can change heart signaling, causing the heart to beat too fast, too slow, or irregularly. Some irregular heartbeats may cause stroke or sudden cardiac death if not treated

Endocarditis

An infection of the lining of the heart and heart valves. Untreated, it can damage or destroy the heart valves or cause a stroke. Antibiotics may be recommended before dental care to prevent it, and regular dental checkups matter — healthy gums and teeth reduce the risk

Stroke

Congenital heart disease can let a blood clot pass through the heart and travel to the brain, causing a stroke

Pulmonary hypertension

High blood pressure in the lung arteries. Some heart conditions present at birth send more blood to the lungs, causing pressure to build. This eventually weakens the heart muscle and sometimes causes it to fail

Heart failure

The heart cannot pump enough blood to meet the body's needs

Adult congenital heart disease and pregnancy

It may be possible to have a successful pregnancy with mild congenital heart disease. A healthcare professional may tell you not to get pregnant if you have complex congenital heart disease. Before becoming pregnant, talk with your healthcare team about the possible risks and complications. Together you can discuss and plan for any special care needed during pregnancy.

How Adult Congenital Heart Disease Is Diagnosed

To diagnose congenital heart disease in adults, your healthcare professional examines you and listens to your heart with a stethoscope. You are usually asked questions about your symptoms and your medical and family history.

Tests are done to check the heart's health and look for other conditions that may cause similar symptoms.

Test

What it shows

Electrocardiogram (ECG)

A quick test that records the electrical activity of the heart and shows how the heart is beating. Sticky patches with sensors called electrodes attach to the chest and sometimes the arms or legs, and wires connect them to a computer. An ECG can help diagnose irregular heart rhythms

Chest X-ray

Shows the condition of the heart and lungs. It can reveal whether the heart is enlarged or the lungs have extra blood or other fluid, which could be signs of heart failure

Pulse oximetry

A sensor placed on the fingertip records how much oxygen is in the blood. Too little oxygen may signal a heart or lung condition

Echocardiogram

Uses sound waves to create pictures of the beating heart, showing how blood flows through the heart and heart valves. A standard echocardiogram takes pictures from outside the body. If more detail is needed, a transesophageal echocardiogram (TEE) creates pictures from inside the body for a detailed look at the heart and the aorta, and is often used to examine the aortic valve

Exercise stress tests

Walking on a treadmill or riding a stationary bike while heart activity is checked, showing how the heart responds to physical activity. If you cannot exercise, medicines that affect the heart the way exercise does may be given instead. An echocardiogram may be done during the stress test

Heart MRI

Also called a cardiac MRI, it creates 3D pictures of the heart, allowing accurate measurement of the heart chambers

Cardiac catheterization

A thin, flexible tube called a catheter is inserted into a blood vessel, usually in the groin, and guided to the heart. It provides detailed information on blood flow and how the heart works, and certain heart treatments can be done during the procedure

Some or all of these tests also may be done to diagnose congenital heart defects in children.

Seven diagnostic tests for adult congenital heart disease: ECG, chest X-ray, pulse oximetry, echocardiogram, stress test, heart MRI, and cardiac catheterization

Treatment Options

A person born with a congenital heart defect can often be treated successfully in childhood. But sometimes the heart condition may not need repair during childhood, or the symptoms are not noticed until adulthood.

Treatment depends on the specific type of heart condition and how severe it is. If the heart condition is mild, regular health checkups may be the only treatment needed. Other treatments may include medicines and surgery.

Medications

Some mild types of congenital heart disease in adults can be treated with medicines that help the heart work better. Medicines also may be given to prevent blood clots or to control an irregular heartbeat.

Surgeries and other procedures

Some adults with congenital heart disease may need a medical device or heart surgery.

Treatment

How it works

Implantable heart devices

A pacemaker or an implantable cardioverter-defibrillator (ICD) may be needed. These devices help improve some of the complications that can occur with congenital heart disease in adults

Catheter-based treatments

Some types can be repaired using thin, flexible tubes called catheters, letting doctors fix the heart without open-heart surgery. A catheter is inserted through a blood vessel, usually in the groin, and guided to the heart — sometimes more than one catheter is used. Tiny tools are then threaded through the catheter to fix the heart condition

Open-heart surgery

If catheter treatment cannot fix the congenital heart disease, open-heart surgery may be needed. The type of surgery depends on the specific heart condition

Heart transplant

If a serious heart condition cannot be treated, a heart transplant might be needed

Follow-up care

Adults with congenital heart disease are at risk of developing complications — even if surgery was done to repair a defect during childhood. Lifelong follow-up care is important. Ideally, a doctor trained in treating adults with congenital heart disease should manage your care. This type of doctor is called a congenital cardiologist.

Follow-up care may include blood and imaging tests to check for complications. How often you need health checkups depends on whether your congenital heart disease is mild or complex.

Lifestyle, Self-Care, and Coping

If you have congenital heart disease, lifestyle changes may be recommended to keep the heart healthy and prevent complications.

You may also find that talking with other people who have congenital heart disease brings comfort and encouragement. Ask your healthcare team if there are support groups in your area.

It helps to become familiar with your condition. Key things to learn include the name and details of your heart condition and how it has been treated, the symptoms of your specific type and when to contact your healthcare team, how often you should have checkups, information about your medicines and their side effects, how to prevent heart infections and whether you need antibiotics before dental work, exercise guidelines and work restrictions, birth control and family planning information, and health insurance coverage options.

Preparing for Your Appointment

If you were born with a heart condition, make an appointment for a health checkup with a doctor trained in treating congenital heart disease — even if you are not having any complications. Regular health checkups are important if you have congenital heart disease.

When making the appointment, ask whether there is anything you need to do in advance, such as avoiding food or drinks for a short period of time. Then prepare a list covering your symptoms (including any that seem unrelated to the heart defect) and when they began, important personal information including a family history of congenital heart defects and any treatment you received as a child, all medicines, vitamins, and supplements you take (including over-the-counter products) with dosages, and the questions you want to ask.

Questions you might want to ask include how often you need heart tests, whether tests require special preparation, how complications will be monitored, how likely your children are to have a congenital heart defect, whether there are diet or activity restrictions, how to manage other health conditions alongside your heart condition, and what printed materials or websites are recommended.

Your healthcare team may ask about your symptoms and their pattern — whether they come and go or are constant, how bad they are, what improves them, and what makes them worse — as well as your lifestyle, including diet, tobacco use, physical activity, and alcohol use.

Four treatment paths for adult congenital heart disease: checkups and medication, implantable devices, catheter-based repair, and open-heart surgery or transplant

Conclusion: Lifelong Heart Care Is Worth It

Adult congenital heart disease is a reality for a growing number of people, thanks to the dramatic advances that have allowed those born with heart defects to live full, long lives. But a repaired defect does not end the story. Symptoms can appear for the first time in adulthood, and complications such as arrhythmias, endocarditis, stroke, pulmonary hypertension, and heart failure can develop years after treatment.

The good news is that this condition is highly manageable with the right plan: regular checkups, prompt attention to warning symptoms, and care led by a doctor trained in adult congenital heart disease. With today's medications, catheter procedures, surgical options, and devices, most people with congenital heart disease can live active lives.

If you were born with a heart defect — whether or not you had treatment as a child — schedule a checkup with a heart specialist today.

Frequently Asked Questions

What is adult congenital heart disease? It is one or more structural problems with the heart present at birth that change how blood flows through the heart. Some types are mild, while others can cause life-threatening complications, and many people are not diagnosed until adulthood.

What are the common symptoms in adults? Symptoms include irregular heartbeats (arrhythmias), shortness of breath, feeling tired very quickly with activity, swelling from fluid buildup (edema), and blue or gray skin, lips, or fingernails from low oxygen levels.

Can symptoms appear years after childhood treatment? Yes. Symptoms may return years after a congenital heart defect is treated, and some people do not notice symptoms until later in life.

What causes congenital heart disease? Researchers are not sure what causes most types. Gene changes, certain medicines or health conditions during pregnancy, and environmental or lifestyle factors such as smoking may play a role.

What are the main risk factors? Inherited gene changes, rubella or type 1 or type 2 diabetes during pregnancy, certain medicines like lithium and isotretinoin taken during pregnancy, alcohol use during pregnancy, and smoking during pregnancy.

What complications can develop years later? Arrhythmias, infection of the heart lining (endocarditis), stroke, high blood pressure in the lung arteries (pulmonary hypertension), and heart failure.

How is it diagnosed? Through a physical exam and tests such as an electrocardiogram (ECG), chest X-ray, pulse oximetry, echocardiogram (including transesophageal echo), exercise stress tests, heart MRI, and cardiac catheterization.

How is it treated in adults? Treatment depends on the type and severity. It may be only regular checkups, or include medications, implantable devices like pacemakers or ICDs, catheter-based repairs, open-heart surgery, or a heart transplant.

Do I still need a heart doctor if my defect was fixed in childhood? Yes. Adults with congenital heart disease remain at risk of complications even after childhood repair, so lifelong follow-up with a doctor trained in adult congenital heart disease (a congenital cardiologist) is important.

Is pregnancy possible with congenital heart disease? It may be possible with mild congenital heart disease, but a provider may advise against pregnancy with complex disease. Planning ahead with your healthcare team is essential.

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