Duct dependant heart defects
i.e - good with Patent ductus arteriosus but deteriorates with its closure
Left Sided Lesions : (depend on ductus for systemic blood flow)
- Congenital AS
- Coarctation of Aorta
- Interrupted Aortic Arch
- Hypoplastic Left heart syndrome
if ductus closes - Presents as Shock
Therefore give Prostaglandins infusion (PG E1)
Severe Right Sided Lesion (Depend on ductus for pulmonary blood flow)
i.e After birth - blood flow to lungs only if Ductus is open - if closes then Cyanosis.
- Critical PS
- Tricuspid Atresia
- Tetrology of fallot
TGA i.e Aorta from right and pulmonary trunk from left
Thus systemic circuit will have only unoxygenated blood
and Pulmonary circuit will have only oxygenated blood
thus it depends on Ductus for Oxygen.
Note : Truncus Arteriosus (i.e Pulm Art and Aorta are 1) is ductal independant.
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