Assertion: baby's child | /r/HasAspect | a patent ductus arteriosus
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text: Dr. Taussig had recognized that children with Tetralogy of Fallot who also had a patent ductus arteriosus (PDA) typically lived longer, so the trio tried to create the same effect as a PDA by joining the subclavian artery to the pulmonary artery, relieving the child's cyanosis.