Flashcards in Fetal Heart Deck (15)
At what gestational week has the heart formed all 4 chambers
Callen states best fetal ❤️imaging is done at
20-22 weeks. Bone shadow in 3rd tri makes ❤️hard to see.
❤️ occupies ___ of chest
1st to function
Circulation begins 5 wks
Heart initially a tube. Develops by 7 wks
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
Bypasses fetal lungs
Closes after birth & becomes lig arteriosum
Ductus Venosus. Dumps into IVC
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
Tilt up from 4 ch. asc aorta makes 5th chamber
Long axis view
From long axis. Tilt more right and obtain
Short axis view
Long chest. *RVOT.
Left atrium close to
Right vent close to
Anterior chest wall