主动脉弓的三大分型

主动脉弓的三大分型

Aortic arch classification.
Type I: the great vessels arise above or in the same horizontal plane of the outer curvature of the arch.
Type II: the origin of the innominate artery lies between the horizontal planes of the outer and inner curvatures of the aortic arch.
Type III: the innominate artery lies below the horizontal plane of the inner curvature of the arch.

主动脉弓的凸侧向上发出3个分支，自右向左依次为头臂干（分为右颈总动脉和右锁骨下动脉），左颈总动脉和左锁骨下动脉。