Fetal Heart

Question 0

Callen states best fetal ❤️imaging is done at

Answer 0

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

Question 1

At what gestational week has the heart formed all 4 chambers

Answer 1

Week 8

Question 2

❤️ occupies ___ of chest

Answer 2

1/3

Question 3

CV system

Answer 3

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

Question 4

Fetal Circulation

Answer 4

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

Question 5

Bypasses fetal lungs

Answer 5

Ductus Arteriosus

Closes after birth & becomes lig arteriosum

Question 6

Bypasses liver

Answer 6

Ductus Venosus. Dumps into IVC

Question 7

4 ch

Answer 7

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

Question 8

5 ch

Answer 8

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

Question 9

Long axis view

Answer 9

LVOT

Question 10

From long axis. Tilt more right and obtain

Answer 10

RVOT

Question 11

Short axis view

Answer 11

Long chest. *RVOT.

Question 12

Left atrium close to

Answer 12

Spine

Question 13

Right vent close to

Answer 13

Anterior chest wall

Question 14

Foramen ovale

Answer 14

Flap in rt atrium