Transposition of the great arteries (TGA) is a congenital heart defect where the two main arteries, the aorta and the pulmonary artery, are switched. This means that oxygen-poor blood is sent back to the body instead of going to the lungs, while oxygen-rich blood is sent back to the lungs instead of the body. This condition can lead to serious health issues if not treated promptly. TGA is typically diagnosed in newborns and can be life-threatening. Treatment often involves surgical intervention to correct the positioning of the arteries, allowing for proper blood flow. Early detection and management are crucial for improving outcomes in affected infants.