Describe TGV?

Describe TGV?

• A. When the origin of the aorta and pulmonary artery are reversed
• B. When the great vessels are in their normal positions
• C. When there is a single great vessel
• D. When the heart is rotated within the chest

Answer: (A)

Transposition of the great vessels means the origins of the aorta and the pulmonary artery are swapped. The aorta comes off the right ventricle and the pulmonary artery off the left ventricle, so the blood flow becomes two parallel circuits instead of the normal one after another. Oxygen-poor blood returns to the body, and oxygen-rich blood cycles back to the lungs unless there’s mixing through a shunt like a PDA, ASD, or VSD. This setup causes cyanosis in the newborn unless mixing is present. The description matches this condition because it focuses on the reversed origins of the great vessels. In contrast, normal great-artery positions describe typical anatomy, a single great vessel refers to truncus arteriosus, and heart rotation within the chest describes dextrocardia or related positional anomalies.

Transposition of the great vessels means the origins of the aorta and the pulmonary artery are swapped. The aorta comes off the right ventricle and the pulmonary artery off the left ventricle, so the blood flow becomes two parallel circuits instead of the normal one after another. Oxygen-poor blood returns to the body, and oxygen-rich blood cycles back to the lungs unless there’s mixing through a shunt like a PDA, ASD, or VSD. This setup causes cyanosis in the newborn unless mixing is present. The description matches this condition because it focuses on the reversed origins of the great vessels. In contrast, normal great-artery positions describe typical anatomy, a single great vessel refers to truncus arteriosus, and heart rotation within the chest describes dextrocardia or related positional anomalies.