test 5 aortic coarctation

Question 1

Etiology (cause) of aortic coarctation

Answer 1

• Coarctation is due to an abnormality in development of the embryologic left fourth and sixth aortic arches
• Congenital narrowing with varying degrees of hypoplasia can exist

Question 2

Surgical Correction-coarctation non-invasive (not safe)

Answer 2

• Balloon angioplasty

Question 3

aortic coarctation Surgical Correction more invasively (5)

Answer 3

A. Interposition graft (put graft where coarctation was)
B. End-to-end anastomosis (cut out coartation and attach opposite sides)
C. Patch augmentation (make slice down coarcatated part and add a patch to increase diameter)
D. Subclavian flap repair
E. Ascending to descending aorta bypass graft

Question 4

CPB Considerations for aortic coarctation

Answer 4

• Incision: posterior left lateral thoracotomy
• Aorta is clamped, cut and re-sewn off CPB
• CPB: Off pump standby or LHB
• In rare cases of severe coarctation left heart bypass can be utilized from LA to descending aorta