What is often accompanied by TGV?

What is often accompanied by TGV?

• A. PDA and ASD
• B. VSD and coarctation
• C. Tricuspid atresia
• D. Pulmonary stenosis

Answer: (A)

Transposition of the great arteries creates two parallel circulations, so survival depends on mixing between them. The most reliable mixing comes from shunts that connect the systemic and pulmonary circuits, and a patent ductus arteriosus along with an atrial septal defect are the classic routes for this in the newborn. The ductus arteriosus provides a direct open pathway between the aorta and the pulmonary artery, allowing blood to cross between circuits, while an ASD lets oxygenated blood from the left atrium mix with deoxygenated blood in the right atrium, improving systemic oxygen delivery. Because of this, TGA is often accompanied by PDA and ASD, and keeping the ductus open (with medications like prostaglandin E1) is an important initial consideration until surgical correction, typically an arterial switch operation, can be done.

Transposition of the great arteries creates two parallel circulations, so survival depends on mixing between them. The most reliable mixing comes from shunts that connect the systemic and pulmonary circuits, and a patent ductus arteriosus along with an atrial septal defect are the classic routes for this in the newborn. The ductus arteriosus provides a direct open pathway between the aorta and the pulmonary artery, allowing blood to cross between circuits, while an ASD lets oxygenated blood from the left atrium mix with deoxygenated blood in the right atrium, improving systemic oxygen delivery. Because of this, TGA is often accompanied by PDA and ASD, and keeping the ductus open (with medications like prostaglandin E1) is an important initial consideration until surgical correction, typically an arterial switch operation, can be done.