patent ductus arteriosus (PDA)
- 9% of all CHD; M:F = 1:2
- associated with: prematurity, birth asphyxia,
rubella,
coarctation, VSD, trisomy 18 + 21
- mostly assymptomatic
- CHF (rare) usually by 3 months in large L-R shunts (PDA increases shunt volume)
findings (mimicks VSD):
- LA enlargement
- enlarged PA
- increased pulmonary vasculature
- enlarged RV + LV
- "railroad track": calcified ductus arteriosus
PDA beneficial in:
- tetralogy of Fallot
- Eisenmenger pulmonary hypertension
- interrupted aortic arch (supply lower extremity via PDA)
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© 2002, C.E. Kahn, Jr.
2002-04-18