Cardiovascular system Flashcards Preview

Embryology > Cardiovascular system > Flashcards

Flashcards in Cardiovascular system Deck (32)
Loading flashcards...
1

When does the primitive heart begin to beat?

At 21 days

2

where is the ductus venosus?

Connects the umbilical vein to the inferior vena cava

3

Which blood vessel in the fetus connects the umbilical vein to the inferior vena cava?

The ductus venosus

4

What does the ductus venosus become after birth?

Ligamentum venosum

5

What does the ligamentum venosum derive from?

The ductus venosus

6

How does blood divert from right to left atria in fetal life?

Foramen ovale

7

What does the foramen ovale become after birth?

Fossa ovalis

8

How does the foramen ovale close after birth?

Functional closure due to change in atrial pressure

9

In fetal life, which has a higher pressure - right or left atrium?

Right atrium

10

Where is the ductus arteriosus?

Between the pulmonary artery and the aorta

11

What is the vessel from the pulmonary artery to the aorta in fetal life?

Ductus arteriosus

12

What does the ductus arteriosus become after birth?

Ligamentum arteriosus

13

What do the umbilical arteries form after birth?

Medial umbilical ligaments

14

What do the umbilical arteries connect to?

Internal iliac and vesical arteries

15

What causes Wharton's jelly to contract?

Drop in temperature

16

What does the umbilical vein become after birth?

Ligamentum teres found in the falciform ligament

17

Where is the ligamentum teres located?

In the falciform ligament

18

What happens to the right atrial pressure after birth?

It reduces because pressure in the pulmonary artery reduces significantly

19

What is the ligamentum teres derived from?

The umbilical vein

20

How long does it take for the umbilical vein to involute?

First few days of life

21

How long does it take for the ductus venosus to involute?

First few days of life

22

How long does it take for the foramen ovale to close?

First few minutes of life

23

What causes the ductus arteriosus to close?

Absence of prostaglandin E2 produced by the placenta causes constriction of the ductus arteriosus

24

What keeps the ductus arteriosus open during fetal life?

Prostaglandin E2 produced by the placenta

25

How long does it take for the ductus arteriosus to close?

In the first hours of life the ductus arteriosus closes

26

How would you keep the ductus arteriosus patent after birth?

Prostaglandins

27

How do you treat a patent ductus arteriosus in a preterm baby?

Give NSAIDs to induce vasoconstriction - indomethacin infusion or ibuprofen

28

what is the role of indomethacin in PDA closure?

Used to close a PDA in pre-term babies

29

How is a PDA treated in term babies?

Surgical treatment

30

At term how much blood of the uterine blood supply goes to the uterus?

90%