Aoic arch syndrome is due to

Takayasu aeritis is a granulomatous vasculitis of mediumsized and larger aeries characterized principally by ocular disturbances and marked weakening of the pulses in the upper extremities. (Robbins basic pathology,9th edition,pg no.353) Takayasu's aeritis is an inflammatory and stenotic disease of mediumand large-sized aeries characterized by a strong predilection for the aoic arch and its branches. For this reason, it is often referred to as the aoic arch syndrome. (Harrison&;&;s principle of internal medicine,18th edition,pg no.)