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Flashcards in Fetal Heart Deck (15)
0

At what gestational week has the heart formed all 4 chambers

Week 8

1

Callen states best fetal ❤️imaging is done at

20-22 weeks. Bone shadow in 3rd tri makes ❤️hard to see.

2

❤️ occupies ___ of chest

1/3

3

CV system

1st to function
Circulation begins 5 wks
Heart initially a tube. Develops by 7 wks

4

Fetal Circulation

Placenta -> Umbilical vein + (ductus venosus bypasses liver & drains to IVC) left portal vein -> liver -> hep veins -> IVC -> rt atrium (-> rt vent -> main pulmonary artery -> ductus arteriosus bypasses lungs -> aorta) -> foramen ovale -> lt atrium -> lt ventricle -> aorta -> common iliacs -> rt/lt internal iliacs -> 2 umbilical arteries -> placenta

5

Bypasses fetal lungs

Ductus Arteriosus

Closes after birth & becomes lig arteriosum

6

Bypasses liver

Ductus Venosus. Dumps into IVC

7

4 ch

Rt vent closer to anterior chest wall.
Lt atrium closest to aorta and spine.

Asses ❤️position, septal defects, patency of valves, TV inserts lower than MV

8

5 ch

Tilt up from 4 ch. asc aorta makes 5th chamber

9

Long axis view

LVOT

10

From long axis. Tilt more right and obtain

RVOT

11

Short axis view

Long chest. *RVOT.

12

Left atrium close to

Spine

13

Right vent close to

Anterior chest wall

14

Foramen ovale

Flap in rt atrium