Embrology

Question 1

Ascending aort

& pulmonary trunk

are derived from what embrological structure?

Answer 1

• Truncus arteriosus

Question 2

Smooth parts (outflow tract) of the left and right ventricles are derived from what embrological structure?

Answer 2

• Bulbus cordis

Question 3

The trabeculated part of the L & R atria are derived from what?

Answer 3

• Primitve atria

Question 4

The trabeculated part of the L & R ventricles are derived from what?

Answer 4

• Primitive vetnrilce

Question 5

The smooth part of left atrium is derived from what?

Answer 5

• Primitve pulmonary vein

Question 6

The coronary sinus is derived from what embrological structure

Answer 6

• L horn of the sinus venosus

Question 7

The smooth part of the right atirum is derived from what?

Answer 7

• Right horn of SV

Question 8

What does the R common cardianl vein (RCCV) & the R anterior cardinal vein (RACV) give rise to?

Answer 8

• SVC

Question 9

What forms the foramen primum

Answer 9

Septum primum

Question 10

What forms the foramen secundume that maintains a (R–> L shunt)

Answer 10

Septum secundum

Question 11

Patent foramen ovale

• what is it caused by
• what can it lead to

Answer 11

• caused by: failure of septum primun and septum secundum to fuse at birth
• can lead to: paradoxical emboli

Question 12

The ductus arteriosus is derived from what aortic arch derivative?

Answer 12

• 6th arch

Question 13

What gives rise to the

• proximal part of the R subclavian a.
• Aortic arch

Answer 13

• proximal part of the R subclavian a= R 4th arch
• Aortic arch = L 4th arch

Question 14

IV drug users have which valve effected

Answer 14

Tricuspid

Question 15

Stenosis of what valve would you hear ‘cresendo-decresendo’

Answer 15

• Aortic valve

Question 16

What gives rise to the L common carotid a

Answer 16

3rd L aortic arch