2D Aortic Arch measures
2D measurement of the aortic arch from the suprasternal window
January 23, 2021
Suprasternal (jugular) 2D longitudinal view of the aortic arch.
Measures: A. proximal arch; B. mid-arch; C. distal arch. AA: ascending aorta; TA: anonymous art. (brachiocephalic); CA: left carotid; SU: left subclavian art.
Measures should be performed “inner edge” to “inner edge”. I prefer to measure the arch at the “exit” point (C, the boundary between the aortic arch and the descending thoracic aorta), which is also the (normal) smaller diameter, immediately distal to the left subclavian artery. When in doubt about the anatomy (poor image resolution), adding color Doppler may help identify the lumen of the aortic arch, and the correct diameter (gain should be kept low to avoid shadowing of the anatomy of the walls by “overflowing” color signal).
测量：A.主动脉弓近端；B. 主动脉弓中段；C. 主动脉弓远端AA：升主动脉；TA：无名动脉(头臂动脉)；CA：左颈动脉；SU：左锁骨下动脉。