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Congenital Heart Defects
Summary
What are congenital heart defects?
Congenital heart defects (CHDs) are problems with the structure of the heart. “Congenital” means that that the problems are present at birth. These defects happen when a baby’s heart doesn’t develop normally during pregnancy. Congenital heart defects are the most common type of birth defect.
Congenital heart defects can change the way the heart pumps blood. They may make blood flow too slowly, go the wrong way, or block it completely.
There are many types of congenital heart defects. They can happen in one or more parts of the heart. The most common types are:
- Septal defects (“hole in the heart”) – openings in the wall between the left and right sides of the heart
- Heart valve defects – problems with the valves that control the flow of blood through the heart
- Defects in the large blood vessels that carry blood in and out of the heart
Congenital heart defects can range from very mild problems that never need treatment to life-threatening problems at birth. The most serious congenital heart defects are called critical congenital heart disease. Babies with these defects usually need surgery in the first year of life. But the symptoms of milder heart defects may not show up until childhood or adulthood.
What causes congenital heart defects?
Researchers often don’t know what causes congenital heart defects. They do know that changes in a baby’s genes sometimes cause a heart defect. The changed genes may come from the parents, or the changes may happen during pregnancy.
Who is more likely to have a baby with a congenital heart defect?
Several things may increase the chance that your baby has a congenital heart defect, such as:
- Your health before and during pregnancy, including
- Having diabetes before pregnancy or developing it in the first 3 months of pregnancy (diabetes that develops later in pregnancy isn’t a major risk for heart defects). Carefully controlling your blood sugar before and during pregnancy can lower your baby’s risk of congenital heart defects.
- Having phenylketonuria (PKU), a rare inherited disorder that affects how the body uses a protein in foods. If you have PKU, eating a low-protein diet before getting pregnant can lower your baby’s risk of having a congenital heart defect.
- Having rubella (German measles) during pregnancy.
- Your contact with certain substances during pregnancy, including
- Smoking or secondhand smoke (breathing smoke from another smoker).
- Certain medicines, such as angiotensin-converting (ACE) inhibitors for high blood pressure and retinoic acids for acne. If you’re pregnant or plan to get pregnant, talk with your health care provider about all the medicines you take.
- Your family history and genetics. In most cases, congenital heart defects don’t run in families. But your chance of having a baby with a congenital heart defect does go up if you or the other parent has a congenital heart defect, or if you already have a child with a congenital heart defect.
What are the symptoms of congenital heart defects?
Congenital heart defects don’t cause pain. The signs and symptoms are different, depending on the type and number of defects and how serious they are.
Common signs and symptoms of congenital heart defects include:
- Cyanosis – a bluish color to the skin, lips, and fingernails. It happens when there isn’t enough oxygen in the blood
- Fatigue – your baby may be unusually sleepy and may become very tired during feedings
- Poor blood flow
- Fast or difficult breathing
- Heart murmur – an unusual sound between heartbeats
What other problems do congenital heart defects cause?
Congenital heart defects don’t always cause other problems. If they do, which problems you have would depend on the type and number of defects and how serious the defects are.
Children with congenital heart defects are more likely to:
- Be smaller than other children
- Have problems or delays in mental, and emotional growth, and behavior, such as:
People with congenital heart defects may develop other health conditions, including:
- Endocarditis – an infection of lining of the heart and valves
- Arrhythmia – a problem with the rate or rhythm of your heartbeat
- Heart failure – when your heart can’t pump enough blood to the body
- Pulmonary hypertension – high blood pressure in your lungs
- Kidney and liver disease
How are congenital heart defects diagnosed?
- Before a baby is born, your provider may use ultrasound pictures of the baby’s heart to look for heart defects. This is called a fetal echocardiogram. It’s done between weeks 18 and 22 of pregnancy.
- During the first few days after birth, all newborns are checked for congenital heart defects. A pulse oximeter is clipped to your baby’s hands or feet to measure blood oxygen. If it shows low levels of blood oxygen, more tests will be needed to find out if your baby has a heart defect.
- To diagnose congenital heart defects in babies, children, and adults, a provider may use many tools, including:
- A physical exam.
- Certain heart tests to see how the heart is working.
- Genetic testing to see if certain gene problems caused the defect.
What are the treatments for congenital heart defects?
Treatment depends on the type of congenital heart defect and how serious it is. Possible treatments include:
- Cardiac catheterization to repair simple defects, such as a small hole in the inside wall of the heart. A catheterization uses a thin tube guided through a vein and into the heart.
- Heart surgery may be needed to:
- Repair defects in the heart and blood vessels.
- Repair or replace a heart valve.
- Place a device in the chest to help the heart pump blood.
- Do a heart transplant.
- Medicine is often used if your baby has a specific type of congenital heart defect called patent ductus arteriosus.
All children and adults who have congenital heart defects need regular follow-up care from a cardiologist (a doctor who specializes in heart diseases) throughout their life, even if their defect was repaired.
Some people may need several heart surgeries or catheterizations over the years. They may also need to take medicines to help their hearts work as well as possible.
NIH: National Heart, Lung, and Blood Institute
National Heart, Lung, and Blood Institute
Children
- 22q11.2 Deletion Syndrome (DiGeorge Syndrome) (For Parents) Nemours Foundation
- Atrial Septal Defect (ASD) (For Parents) Nemours Foundation
- Atrial Septal Defect (For Parents) Nemours Foundation
- Congenital Heart Defects (For Parents) Nemours Foundation
- Heart Murmurs (For Kids) Nemours Foundation
- Hypoplastic Left Heart Syndrome (HLHS) (For Parents) Nemours Foundation
- Ventricular Septal Defect (For Parents) Nemours Foundation
- What Is a Pediatric Heart Surgeon? American Academy of Pediatrics
Genetics
- 22q11.2 deletion syndrome: MedlinePlus Genetics National Library of Medicine
- Alagille syndrome: MedlinePlus Genetics National Library of Medicine
- Cantú syndrome: MedlinePlus Genetics National Library of Medicine
- Cardiofaciocutaneous syndrome: MedlinePlus Genetics National Library of Medicine
- Char syndrome: MedlinePlus Genetics National Library of Medicine
- CHARGE syndrome: MedlinePlus Genetics National Library of Medicine
- Critical congenital heart disease: MedlinePlus Genetics National Library of Medicine
- Holt-Oram syndrome: MedlinePlus Genetics National Library of Medicine
- McKusick-Kaufman syndrome: MedlinePlus Genetics National Library of Medicine
- MED13L syndrome: MedlinePlus Genetics National Library of Medicine
- Noonan syndrome: MedlinePlus Genetics National Library of Medicine
- Oculofaciocardiodental syndrome: MedlinePlus Genetics National Library of Medicine
- Recombinant 8 syndrome: MedlinePlus Genetics National Library of Medicine
- Supravalvular aortic stenosis: MedlinePlus Genetics National Library of Medicine
- Timothy syndrome: MedlinePlus Genetics National Library of Medicine
Encyclopedia
- Aarskog syndrome Medical Encyclopedia
- Absent pulmonary valve Medical Encyclopedia
- Anomalous left coronary artery from the pulmonary artery Medical Encyclopedia
- Aortopulmonary window Medical Encyclopedia
- Chest x-ray Medical Encyclopedia
- Coarctation of the aorta Medical Encyclopedia
- Coronary artery fistula Medical Encyclopedia
- Double aortic arch Medical Encyclopedia
- Double inlet left ventricle Medical Encyclopedia
- Double outlet right ventricle Medical Encyclopedia
- Ebstein anomaly Medical Encyclopedia
- Eisenmenger syndrome Medical Encyclopedia
- Endocardial cushion defect Medical Encyclopedia
- Hypoplastic left heart syndrome Medical Encyclopedia
- Left heart catheterization Medical Encyclopedia
- Patent foramen ovale Medical Encyclopedia
- Pediatric heart surgery Medical Encyclopedia
- Pediatric heart surgery – discharge Medical Encyclopedia
- Pulmonary atresia Medical Encyclopedia
- Pulmonary valve stenosis Medical Encyclopedia
- Tetralogy of Fallot Medical Encyclopedia
- Total anomalous pulmonary venous return Medical Encyclopedia
- Transposition of the great arteries Medical Encyclopedia
- Tricuspid atresia Medical Encyclopedia
- Truncus arteriosus Medical Encyclopedia
- Vascular ring Medical Encyclopedia
Start Here
- About Congenital Heart Defects American Heart Association
- Congenital Heart Defects and Critical CHDs March of Dimes Foundation
- Tricuspid Atresia Nemours Foundation
- What Are Congenital Heart Defects? National Heart, Lung, and Blood Institute
- What Are Congenital Heart Defects? Centers for Disease Control and Prevention
Find an Expert
- American Heart Association American Heart Association
- National Heart, Lung, and Blood Institute National Heart, Lung, and Blood Institute
Specifics
- Aortic Valve Stenosis Mayo Foundation for Medical Education and Research
- Arrhythmogenic Right Ventricular Cardiomyopathy (ARVC) American Academy of Family Physicians
- Atrioventricular Canal Defect Nemours Foundation
- Atrioventricular Canal Defect Mayo Foundation for Medical Education and Research
- Coarctation of the Aorta Mayo Foundation for Medical Education and Research
- Congenitally Corrected Transposition of the Great Arteries (CCTGA) Adult Congenital Heart Association
- Coronary Artery Anomalies Texas Heart Institute
- Cyanosis Texas Heart Institute
- Double Outlet Right Ventricle Texas Heart Institute
- Facts about Atrial Septal Defect Centers for Disease Control and Prevention
- Facts about Atrioventricular Septal Defect (AVSD) Centers for Disease Control and Prevention
- Facts about Coarctation of the Aorta Centers for Disease Control and Prevention
- Facts about dextro-Transposition of the Great Arteries (d-TGA) Centers for Disease Control and Prevention
- Facts about Hypoplastic Left Heart Syndrome Centers for Disease Control and Prevention
- Facts about Pulmonary Atresia Centers for Disease Control and Prevention
- Facts about Tetralogy of Fallot Centers for Disease Control and Prevention
- Facts about Total Anomalous Pulmonary Venous Return or TAPVR Centers for Disease Control and Prevention
- Facts about Truncus Arteriosis Centers for Disease Control and Prevention
- Facts about Ventricular Septal Defect Centers for Disease Control and Prevention
- Learning about Velocardiofacial Syndrome National Human Genome Research Institute
- Levo-Transposition of the Great Arteries Nemours Foundation
- Noonan Syndrome (For Parents) Nemours Foundation
- Patent Foramen Ovale Mayo Foundation for Medical Education and Research
- Pulmonary Atresia Texas Heart Institute
- Pulmonary Valve Stenosis Mayo Foundation for Medical Education and Research
- Single Ventricle Defects American Heart Association
- Transposition of the Great Arteries (TGA) Society of Thoracic Surgeons
- Tricuspid Atresia Mayo Foundation for Medical Education and Research
- Ventricular Septal Defect (VSD) Mayo Foundation for Medical Education and Research
Patient Handouts
- Atrial septal defect (ASD) Medical Encyclopedia
- Bicuspid aortic valve Medical Encyclopedia
- Congenital heart defect corrective surgeries Medical Encyclopedia
- Congenital heart disease Medical Encyclopedia
- Cyanotic heart disease Medical Encyclopedia
- Dextrocardia Medical Encyclopedia
- Echocardiogram — children Medical Encyclopedia
- Heart murmurs and other sounds Medical Encyclopedia
- Patent ductus arteriosus Medical Encyclopedia
- Ventricular septal defect Medical Encyclopedia
Teenagers
- Atrial Septal Defect (For Teens) Nemours Foundation
- Coarctation of the Aorta (For Teens) Nemours Foundation
- Ventricular Septal Defect (For Teens) Nemours Foundation
Living With
- Care and Treatment for Congenital Heart Defects American Heart Association
- Challenges Faced by Parents of Children with Congenital Heart Disease American Academy of Pediatrics
- Feeding Tips for Your Baby with CHD American Heart Association
- Living with a Congenital Heart Defect Centers for Disease Control and Prevention
Women
- CHD’s Impact on Females American Heart Association
- Heart Conditions and Pregnancy: Know the Risks Mayo Foundation for Medical Education and Research
Clinical Trials
- ClinicalTrials.gov: Heart Defects, Congenital National Institutes of Health
- ClinicalTrials.gov: Heart Murmurs National Institutes of Health
Related Issues
- Congenital Heart Defects and Physical Activity American Heart Association
- Heart Murmurs Mayo Foundation for Medical Education and Research
- Heart Murmurs and Your Child (For Parents) Nemours Foundation
- Infective Endocarditis American Heart Association
Statistics and Research
- Data and Statistics on Congenital Heart Defects Centers for Disease Control and Prevention
- Heart Disease and Stroke Statistics American Heart Association
Español/Spanish
- Glenn Procedure Nemours Foundation
Diagnosis and Tests
- Heart Health Tests: MedlinePlus Health Topic National Library of Medicine
- Screening for Critical Congenital Heart Disease in Newborns American Heart Association
Treatments and Therapies
- Heart Treatments National Heart, Lung, and Blood Institute
- Therapeutic Cardiac Catheterizations for Children with Congenital Heart Disease American Heart Association
Reference Desk
- How the Heart Works National Heart, Lung, and Blood Institute