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Cardiovascular system



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)

Yong H. Hahn, MD  -  2 February 1995
Last updated:  1 October 2013


Related CHORUS documents:
abnormal heart chamber dimensions
aortic coarctation
left ventricular volume overload
neonatal heart failure
aortic stenosis
Ebstein anomaly


Copyright © 2013, Charles E. Kahn, Jr.