Figure
2. Main classification of the acute TBAD primary entry tear positions.
Inner (concave) (A ) primary entry tears (IT) occur at the inner
circumference of the distal aortic arch and are unopposed to retrograde
sequelae in the aortic arch and ascending aorta. Outer (convex)
(B ) primary entry tears (OT) occur at the outer circumference
of the distal aortic arch and are opposed to retrograde sequelae by the
left subclavian artery. Adapted and reproduced from Loewe et. al (27)
with permission from Elsevier.