15 Questions
What are the three critical anatomic communications in fetal circulation?
PFO (from RA to LA), PDA (from PA to AO), Ductus venosus (from UV to IVC)
What is responsible for organ oxygenation in fetal circulation?
Placenta
What causes the right-to-left shunting through foramen ovale to cease in the transition from fetal to post-natal circulation?
Pulmonary vascular resistance falls
What determines the timing of presentation of congenital heart defects?
Timing of the events such as closure of ductus venosus and ductus arteriosus
Name two stenotic congenital heart defects.
AS (Aortic Stenosis), PS (Pulmonary Stenosis)
What is the principle difference in fetal circulation compared to post-natal circulation?
Presence of ductus venosus in fetal circulation
Which structure is responsible for organ oxygenation in fetal circulation?
Ductus venosus
What causes the right-to-left shunting through foramen ovale to cease in the transition from fetal to post-natal circulation?
Fall in pulmonary vascular resistance
What represents a stenotic congenital heart defect?
Pulmonary stenosis (PS)
What determines the timing of presentation of congenital heart defects?
Timing of specific events during transition from fetal to post-natal circulation
What is the normal systolic blood pressure in the pulmonary artery for a fetus?
80 mmHg
Which structure closes to cease the right-to-left shunting through foramen ovale in the transition from fetal to post-natal circulation?
Pulmonary valve
Which congenital heart defect is characterized by the presence of a VSD (ventricular septal defect)?
Tetralogy of Fallot (TOF)
What is the principle difference in post-natal circulation compared to fetal circulation?
Decreased pulmonary artery pressure
In fetal circulation, what is the role of the ductus venosus?
It connects the umbilical vein to the inferior vena cava
Test your knowledge about the principle differences in fetal circulation compared to post-natal circulation in congenital heart disease. Understand the critical anatomic communications and the transition from fetal to post-natal circulation.
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