Transposition Of The Great Arteries (TGA)

Transposition of the GreatArteries (TGA) is a congenital heart defect in which the two main arteries leaving the heart are switched. Normally, the aorta carries oxygen-rich blood from the left ventricle to the body, while the pulmonary artery transports oxygen-poor blood from the right ventricle to the lungs. In TGA, these connections are reversed, causing oxygen-poor blood to circulate through the body and oxygen-rich blood to repeatedly return to the lungs. As a result, newborns often develop severe cyanosis, rapid breathing, poor feeding, and low oxygen levels shortly after birth.

The exact cause of TGA remains unknown, although genetic and environmental factors may contribute to its development during fetal growth. Diagnosis is typically confirmed through echocardiography, along with pulse oximetry and other cardiac imaging techniques. Initial treatment focuses on improving oxygen delivery, often using medications and procedures that allow blood mixing between the heart's chambers. Definitive management usually involves an arterial switch operation performed during the first weeks of life to restore normal blood circulation.

With timely surgical correction and regular follow-up, most children with TGA can achieve excellent long-term outcomes, lead active lives, and experience significantly improved heart function and overall quality of life.