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Rrt

Clt

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» Prt

Outflow resistance R or compliance C determine shunt volume

.— E. Consequences of Postnatal Patent Ductus Arteriosus (PDA)

Prenatal ductus arteriosus: right-to-left shunt

Birth

Vascular resistance: peripheral pulmonary 4

Prenatal ductus arteriosus: right-to-left shunt

Birth

Shunt reversal: right-to-left shunt

Cyanosis of lower half of body

Persisting Left-to-right shunt

Postnatally: left-to-right shunt

Spontaneous closure after birth

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