What are congenital heart defects?
Congenital heart defects (CHD) are a common type of birth defect affecting the flow of blood to, from and through the heart. While some CHDs cause no symptoms and go undetected until adulthood, others cause severe and life-threatening symptoms. This is called critical congenital heart disease (CCHD) and often requires surgical intervention and special medical care in the baby's first year of life. Due to advances in medicine and surgical innovation, many babies that once would have died due to congenital heart defects now go on to live full and energetic lives, but may need ongoing monitoring of their hearts as they age.
Who is at risk of congenital heart defects?
While it is not well understood why some babies have CHDs, or why some with CHDs experience symptoms while others have no problems, a baby may be more at risk if the mother:
- Smokes during pregnancy
- Has a health condition such as diabetes
- Is taking certain medications during pregnancy
Congenital heart disease may also be influenced by genetic changes and environmental factors, making it difficult to determine exactly why it happens.
Types of congenital heart defects
Atrial septal defect, atrioventricular septal defect, and ventricular septal defect are common examples of CHDs.
CHDs that are critical and produce life-threatening symptoms include:
- Coarctation of the aorta
- D-transposition of the great arteries
- Ebstein anomaly
- Hypoplastic left heart syndrome
- Pulmonary atresia
- Single ventricle
- Tetralogy of Fallot
- Truncus arteriosus
What are the symptoms of congenital heart defects?
In babies with a critical congenital heart defect, symptoms come on soon after birth, such as:
- Blue or purplish tint to the skin (due to low oxygen levels in the blood)
- Heart murmur
- Low blood pressure
- Poor feeding
- Rapid breathing