Embrology & Anatomy Flashcards
(48 cards)
The bulbus cordis gives rise to
Proximal bulbus cordis to the RV
Distal bulbus cordis outflow tracts
The primitive ventricle gives rise to
The LV
In juxtaposition of the atrial appenange the atrial appendages are _____ of the outflow tracts
This is commonly seen in association with underdeveloped R or L sided strucures
To the L of outflow tracts
Believed to be 2/2 to an arrest in development in this early stage after dlooping of the primitive heart tube. Because the development of thr RV lags behind the LV, we commonly see this associated with
Commonly associated with an underdeveloped R side and both outflow tracts arising from the RV
The common atria initally drain to what structure
-bulbous cordis or primtive ventricle
AV canal drains into the primitive ventricle
Which is why double inlet left ventricle is thought to be 2/2 an arrest in development at 4-6 weeks of development
The flow going thru the heart at this point is atria, LV, bulbous cord is, outflow tracts
The truncal aortic sac gives rise to
The great arteries
What normal stage of development causes the AV valve to be positioned over both ventricles and form two distinct AV valves
Growth of thr RV
What does the 1° heart field give rise to?
D embryonic ventricle —>lv and atria (appendages)
What does the secondary heart field give his to?
Bulbus cordis
Proximal becomes RV
Distal becomes truncoaortic sacs or outflow tracts
What genetic deletion affects the neural crest cells?
22q11
What happens with abnormal migration of the neural crest cells?
Abnormal development of the great arteries
ToF,IAA
Abnormal looping of the heart results in what abnormality?
L-TGAor ccTGA
Abnormalities in the dorsal meserchymal protrusion will lead to?
Common AV canal defects
The limbus of the fossa oval is can be found in which cardiac chamber
RA
What is the eustachian valve and where is it found
Entrance of IVC to RA, important structure fetally to direct oxygenated blood Across the ASD to the LA
What is the thebesian valve and where is it found
Opening of the coronary sinus to the ra
A broad based appendage with pectinate muscle extending out is going to be
RA appendage
Describe where pectinate muscle can be found within the LA
Confined to the finger like LA appendage
The flap valve of the fossa ovalis is found in which cardiac chamber
LA—the two attachments of the septum primum onto the septum secundum
A secundum ASD is 2/2 hole in septum …
A primum asd is 2/2 hole in septum…
When a vein overrides the ASD you get
Secundum asd-hole in septum primum
2) canal septum
3) sinus venous defect
What is the difference between an overriding vs straddling AV valve?
Override—AV valve annulus Empties into both ventricles, normal chordal attachment
Straddling—anomalous chordal attachments to both ventricles
What are the other terms for a permemibranous VSD?
Peri-membranous
Central
Conoventricular
Where does the conduction tissue run along peri-membranous vids?
Posterior-inferior rim of VSD
So the surgeon has to be careful below and behind the VSD
Where does the conduction system run with an inlet VSD?
Posterior or inferior rim
Like PM VSD, surgeon must watch below and beneath defect
What type of VSD is found between the Y of the septal band?
Outlet or juxtarterial doubly committed or conoseptal hypoplasia VSD
Aortic and pulmonary valve fibrous continuity 2/2 hypoplastic conal/infundibular septum
High risk for RCC prolapse therefore presence of defect is indication for closure
