RNC-NIC Cardiac || Most Recent Exam Actual
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Which fetal shunt is located between the right and left
atria?
A. Ductus arteriosus
B. Ductus venous
C. Foremen ovale - Answer-C. The foramen ovale is
located between the atria.
Which fetal shunt closes first?
A. Ductus arteriosus
B. Ductus venosus
C. Foramen ovale - Answer-B. Closure of the ductus
venosus allows blood flow through the portal/hepatic
system. This leads to an increase in pressure in the left
atrium from the pulmonary venous return which then
closes the foramen ovale. Finally, rising O2 concentration
in the blood and decreased prostaglandin levels closes the
ductus arteriosus.
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Which is connected by the ductus arteriosus?
A. Pulmonary vein and descending aorta
B. Pulmonary artery and descending aorta
C. Pulmonary vein and ascending aorta - Answer-A. The
ductus arteriosus connects the pulmonary vein and the
descending aorta.
Which of the following is true concerning the path of blood
through the heart and neonatal circulation?
A. Oxygen rich blood returns from the umbilical vein into
the left atrium.
B. Oxygen poor blood is pumped from the right ventricle to
the lungs via the umbilical artery.
C. The aorta delivers oxygenated blood to the body. -
Answer-C. The path of blood through the heart in neonatal
circulation is as follows:
1. Oxygen poor blood enters RA - passes through tricuspid
valve to RV - pumped through pulmonary artery to lungs
2. In lungs: blood gives up CO2 and picks up O2
3. Oxygen rich blood returns from lungs through
pulmonary veins - enters LA - passes through mitral valve
into LV - aortic valve to aorta
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4. Aorta delivers oxygenated blood to all body organs and
tissue
The umbilical arteries and vein are only used in fetal
circulation
What happens to neonatal circulation when the umbilical
cord is clamped at delivery?
A. SVR decreases
B. CO decreases
C. SVR increases - Answer-C. When the umbilical cord is
clamped, systemic vascular resistance (SVR) increases,
allowing for the transition from fetal to neonatal circulation
Which occurs first, respiratory adaptation or the transition
to neonatal circulation?
A. Respiratory adaptation
B. Neonatal circulation
C. They occur simultaneously - Answer-C. Fetal to
neonatal circulation occurs simultaneously with the
respiratory adaptation.
Which of the following is not true concerning cardiac
output (CO)?