Embryology Flashcards
What is derived from the primary heart field?
Embryonic ventricle (L) and atria
What is derived from the secondary heart field?
Bulbous cordis (RV), infundibulum, trunco-aortic sac (outflow tracts)
Where do the neural crest cells migrate to?
The truncoaortic sac
What two cardiac defects can be due to abnormalities in neural crest cell migration?
TOF, IAA
What cell type is responsible for the coronary arteries?
Epicardial cells
What does the 4th embryonic arch give rise to?
Aortic Arch and contralateral innominate artery
What does the 6th embryonic arch give rise to?
The ductus
The removal of what two structures of the totipotent arch creates a normal L sided aorta?
R dorsal aorta
R sixth arch
The removal of what two structures of the totipotent arch creates a L arch with abberant R subclav?
R 4th arch
R 6th arch
The removal of what two structures of the totipotent arch creates a R arch with mirror image branching?
L dorsal aorta
R sixth arch
The removal of what two structures of the totipotent arch creates a R arch with abberant L?
L 4th arch
L 6th arch (if ligament, creates ring)
What creates the Diverticulum of Kommerell?
Right arch with aberrant L subclavian with persistence of L 6th arch
- Proximal portion dilates, creating diverticulum
What structures most commonly creates a vascular ring?
Double aortic arch
3 D’s of vascular rings
Dimple
Diverticulum
Descending aorta on opposite side of arch
