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Overview
What Is a Congenital Heart Defect?
A congenital heart defect is a structural problem in the heart that is present at birth. It can affect the heart chambers, valves, blood vessels, or the way blood flows through the heart and body. These heart congenital abnormalities develop while the heart is forming during pregnancy. Some are mild, while others need specialist care soon after birth or throughout life.
Some congenital heart defects cause no early problems and are found during a routine examination or screening. Others affect oxygen levels or circulation and may cause symptoms in babies, children, or adults. Congenital heart disease is different from heart disease that develops later in life, although a person with a congenital cardiovascular condition can also develop other heart problems.
USUALLY WITHOUT BLUE COLORING
Examples include septal defects, sometimes described as a heart hole by birth, and valve abnormalities that may change blood flow without visibly lowering oxygen.
LOWER BLOOD OXYGEN
These defects can reduce blood oxygen and may cause blue or gray coloring, especially during feeding, crying, or exertion. Not every defect fits neatly into only one category.
Symptoms
Symptoms of a Congenital Heart Defect
Symptoms of congenital heart defects vary according to the type and size of the defect and how it affects circulation. Some defects cause noticeable symptoms in infancy, while others are found during a routine examination or screening. Adults may first notice symptoms during exercise, pregnancy, or another medical evaluation.
- Blue or gray skin (cyanosis).
- Rapid breathing.
- Difficulty feeding.
- Poor weight gain.
- Unusual tiredness.
- Swelling of the legs, abdomen, or area around the eyes.
- Fainting.
Causes
Causes of Congenital Heart Defects
Congenital heart defects arise while the heart is forming during pregnancy. Many result from a combination of genetic and environmental factors rather than one identifiable cause. In other words, a congenital disorder may develop through several influences, and doctors often cannot determine exactly why it occurred.
- Genetic or chromosome differences can affect heart development.
- A family history of congenital heart defects may increase risk.
- Some maternal health conditions during pregnancy may affect fetal heart development.
- Certain infections, medicines, or substance exposures during pregnancy may contribute.
- In many cases, no specific cause is identified.
Risk Factors
Risk Factors for Congenital Heart Defects
- A parent or sibling with a congenital heart defect.
- Certain genetic or chromosome conditions.
- A previous pregnancy affected by a congenital heart defect.
- Maternal age and other inherited factors that may influence fetal development.
- Diabetes that is not well controlled before or during pregnancy.
- Certain infections during pregnancy.
- Exposure to some medicines, alcohol, tobacco, or other substances during pregnancy.
- Some maternal health conditions that affect fetal development.
Complications
Complications of Congenital Heart Defects
- Heart failure can occur when the heart cannot pump effectively.
- Abnormal heart rhythms can cause palpitations, dizziness, or fainting.
- Pulmonary hypertension can develop when blood flow places excess pressure on the lung arteries.
- Some children may have delayed growth or development.
- Certain defects can increase the risk of stroke.
- Some structural abnormalities increase the risk of infective endocarditis.
- Adults with complex defects may need specialized care during pregnancy.
Complication risk depends on the specific defect, its severity, whether it was repaired, and the person’s age and overall health. Some people with congenital heart failure or other complications need regular monitoring even after treatment.
Diagnosis
How Congenital Heart Defects Are Diagnosed
Diagnosis may happen before birth, shortly after delivery, during childhood, or in adulthood, depending on the defect and symptoms. Testing helps clinicians understand the heart’s structure, blood flow, rhythm, and effect on the lungs and body.
- A fetal echocardiogram uses ultrasound to examine the baby’s heart before birth.
- Newborn pulse oximetry screening estimates blood oxygen levels.
- A physical examination may identify a heart murmur, abnormal pulses, or signs of poor circulation.
- An echocardiogram uses ultrasound to show heart structure and blood flow.
- An electrocardiogram records the heart’s electrical activity.
- A chest X-ray can show heart size and lung changes.
- Cardiac MRI or CT can provide detailed images of the heart and blood vessels.
- Cardiac catheterization can measure pressures and oxygen levels and sometimes treat a defect.
Treatment & Management
Treatment and Management
| Approach | When it may be used |
|---|---|
| Monitoring | Small or mild defects that may close or remain stable without immediate intervention. |
| Medicines | Symptoms such as fluid buildup, high blood pressure, or abnormal heart rhythms. |
| Catheter procedure | Selected defects that can be widened, closed, or otherwise treated through a blood vessel. |
| Surgery | Defects that require structural repair or cannot be treated effectively with a catheter. |
Some repairs are performed soon after birth, while others are planned later in childhood or adulthood. Treatment may improve circulation without eliminating the need for lifelong congenital cardiology follow-up. The cardiology team selects heart defects treatment based on the defect, symptoms, oxygen levels, growth, and heart function.
- Keep scheduled cardiology visits even when symptoms improve.
- Take medicines exactly as prescribed and ask before stopping them.
- Follow the cardiology team’s dental care and infection prevention advice.
- Ask which physical activities are safe for the specific defect and repair.
- Plan a transition to an adult congenital heart specialist when appropriate.
Outlook and Prognosis
Outlook and Prognosis
Prognosis varies widely. Some congenital heart defects require no treatment, some are repaired successfully, and complex defects may require multiple procedures and lifelong specialist care. Many people with congenital heart disease live into adulthood, although follow-up needs can change over time.
- The type and severity of the defect strongly influence long-term outlook.
- Earlier recognition and appropriate treatment may reduce complications.
- Heart function and oxygen levels help guide prognosis.
- Other genetic or medical conditions can affect recovery and development.
- Some people need repeat procedures or ongoing medicines after repair.
When Should You See a Doctor
When Should You See a Doctor?
- Ask a clinician about persistent feeding difficulty.
- Arrange an evaluation for poor growth or unexplained weight changes.
- Seek medical advice for unusual tiredness or reduced activity.
- Contact a clinician about repeated rapid breathing or breathlessness.
- Have fainting or near-fainting assessed.
- Discuss swelling of the legs, abdomen, or area around the eyes.
- Ask about a newly noticed heart murmur or abnormal heartbeat.
GET EMERGENCY HELP
Severe symptoms need immediate care
For severe trouble breathing, blue or gray coloring, collapse, unresponsiveness, or sudden severe symptoms, call your local emergency services immediately.
Branches
2 topics
Congenital Heart Defect
Cardiology
Congenital Heart Defect
Cardiovascular Surgery
