Truncus arteriosus is a congenital heart defect that is considered to be quite severe. This condition has a significant impact on the normal flow of blood from the heart to the lungs, where it is supposed to receive oxygen. As a result, infants born with this defect experience chronic hypoxia, which means they consistently lack oxygen. The signs and symptoms of truncus arteriosus may become apparent shortly after birth, or they may be diagnosed during prenatal screenings. Treating this condition requires complex heart surgery, and many individuals affected by truncus arteriosus may need multiple surgeries throughout their lives.
A Congenital Defect: Truncus Arteriosus
Truncus arteriosus is a congenital defect that is present from birth. Typically, the heart is equipped with two distinct arteries – one transports blood from the heart to the body, while the other directs blood from the heart to the lungs. However, in infants with truncus arteriosus, the heart is only furnished with a single artery, leading to a disruption in the normal flow of blood.
Blood Flow in Truncus Arteriosus
In individuals with truncus arteriosus, there is often an accompanying ventricular septal defect (VSD), which refers to a hole between the two lower chambers of the heart. This particular combination of conditions allows oxygen-depleted blood from the body to intermingle with oxygen-rich blood from the lungs. Consequently, the mixing of these two types of blood leads to significant complications related to oxygenation.