ABOUT CHD

What is CHD?

Congenital Heart Disease (CHD) encompasses all types of heart conditions or disorders present at birth, including both structural defects and any associated complications or diseases that arise from these defects. The term is often used interchangeably with Congenital Heart Defect, which refers specifically to a structural abnormality of the heart that is present at birth. CHDs can vary in severity from minor defects that may not require treatment to complex conditions that need medical or surgical intervention. CHD is the most common birth defect, affecting approximately 1 in 100 babies born wordwide.

THE 1 IN 100

Common Types of Heart Defects.

Congenital heart defects occur in many different forms, depending on which part of the heart is affected. In total, there are over 30 distinct congenital heart defects, each varying in severity and the impact they have on health. Below are eight common types:

  • An ASD is a hole in the wall (septum) that separates the two upper chambers of the heart (the atria). This defect allows oxygen-rich blood to mix with oxygen-poor blood, which can lead to an enlarged heart and increased workload. Some ASDs may close on their own, but others require surgery or catheter-based procedures.

  • A VSD is a hole in the wall between the two lower chambers of the heart (the ventricles). This defect causes blood to flow abnormally between the ventricles, which can result in heart failure or pulmonary hypertension if not treated. VSDs vary in size and may require surgical repair.

  • PDA is a condition where a blood vessel called the ductus arteriosus fails to close after birth, allowing blood to flow improperly between the aorta and the pulmonary artery. In some cases, the ductus closes on its own, but others may require medication or surgery.

  • Truncus arteriosus is a rare congenital heart defect where the main artery (truncus) that carries blood from the heart to the body and lungs does not properly separate into two separate arteries: the pulmonary artery and the aorta

  • TOF is a complex congenital heart defect that involves four heart abnormalities: a ventricular septal defect (VSD), pulmonary stenosis (narrowing of the pulmonary valve or artery), an overriding aorta, and right ventricular hypertrophy (thickening of the right ventricle). TOF often causes cyanosis (a bluish tint to the skin) and requires surgical intervention early in life.

  • Coarctation is a narrowing of the aorta, the large blood vessel that carries oxygen-rich blood from the heart to the rest of the body. This defect can lead to high blood pressure and heart damage. Surgery is usually required to correct the narrowing.

  • In TGA, the positions of the two main arteries leaving the heart—the pulmonary artery and the aorta—are reversed. This condition causes oxygen-poor blood to circulate through the body, while oxygen-rich blood is sent back to the lungs. TGA is a life-threatening condition that typically requires surgery soon after birth.

  • Hypoplastic right heart syndrome (HRHS) is a rare congenital heart defect where the right side of the heart, particularly the right ventricle, is underdeveloped. This results in an inadequate blood flow to the lungs, leading to low oxygen levels in the body. 

ABOUT CHD

Facts & Stats.