Fetal circulation CVS204 Exam 3
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49 Terms
The foramen ovale closes within _________ after birth
minutes
The foramen ovale closes within _________ after birth
minutes
The 1st day of the last menstrual period
gestational age
There are _________ pathways for blood to flow through the fetal heart
two
Fetal lungs are under _____ pressure before birth and _____ pressure after birth
high, low
true or false: the placenta is an organ
true
The purpose of the 3 fetal shunts is to bypass the __________ & __________
liver and lungs
The primitive ventricle becomes the _________________
left ventricle
In fetal circulation oxygenation occurs in the _____________
placenta
The ductus arteriosus closes within __________ after birth
48-72 hours
The foramen ovale becomes the ________________
fossa ovalis
Oxygenation and carbon dioxide exchange occurs in the ___________
placenta
The umbilical arteries carry nutrient ______ blood from the fetus to the ________
depleted, placenta
The most sensitive period for cardiac development:
3-6 weeks
What are the 3 types of atrial septal defects?
ostium primum, ostium secundum, sinus venosus
what cardiac structure acts as a natural clamp
whartons jelly
in fetal circulation the ___________ brings oxygenated blood to the fetus:
umbilical vein
During cardiac looping, the tube usually loops:
ventrically and to the right
The fetal ductus arteriosus becomes the adult ________
Ligamentum Arteriosum
The Bulbus Cordis develops into:
right ventricle
When the Foramen Ovale doesn't close after birth term
Patent Foramen Ovale
Congenital birth defect where the heart is anterior to the sternum
Pentology of Cantrell
Levo position
when the heart loops to the left
dextro position
when the heart loops to the right
The fetal lungs are under _______ pressure
high
The placenta is under __________ pressure before birth:
low pressure
How many umbilical veins_____, umbilical arteries _____
1,2
true or false :The umbilical cord has nerves
false
The most sensitive period for cardiac development is
3-6 weeks
There are 6 pairs of aortic arches. Which arches are absorbed and do not persist?
1,2 and 5
which arch becomes the aortic arch
4th
which arch becomes the pulmonary arteries
6th
which arch becomes the origin of the ICA?
3rd
the primitive ventricle becomes the
left ventricle
At what gestational age does the fetal heart begin to beat spontaneously?
28 days
septation is between
33- 37 days
In fetal circulation there are:
one vein and two arteries
The fetal heart is developed into a complete complex structure in:
43 days
circulation of the blood begins the
end of the 4th week
how many ventricular septal defects are there ?
4
what are the most common ventricular septal defects
Inlet which is by the TV
where is the inlet located
inside the AV
what are the three shunts
Ductus venosus, foramen ovale, ductus arteriosus
what happens if the fossa ovalis doesnt close
turns to patent foramen ovale
shotcut for the fetal blood flow
bypass the liver and the lungs
how many weeks does the aortic arch form
at 4 weeks
how many pairs of aortic arches are there
6 pairs
what medication used for bipolar disorder causes ebstein anomaly
Lithium
what happens in ebsteins anomalies
tricuspid leaflets. are displaced apically one or more leaflets
rv bcomes smaller