摘要
Abstract
As uncommon embryonic variations of posterior circulation, especially the anatomic variations of vertebral artery (VA), vertebral artery hypoplasia (VAH) and vertebral artery aplasia (VAA), with or without basilar artery morphological abnormalities, have been suggested by substantial data of having relationship with posterior circulation ischemic events, particularly in conjunction with other cerebral vascular risk factors. Inspite of disagreement existing in deifnition and evaluation methods of VAH, color Doppler ultrasonography (CDU) of previous studies have found lower net VA lfow volume of ipilateral hypoplasic artery and an increased compensatory lfow volume of non-hypoplasic artery, resulting local hypoperfusion, even clinical symptoms, illustrating the characteristics of VAH’s more vulnerable to occlusion and distal thrombosis[1]. Besides, VAH may result in other complex neurovascular consequences such as migraine, vestibular neuronitis (VN), episodic dizziness and vertebral artery dissection (VAD), etc.关键词
椎动脉发育不良/后循环缺血性卒中/低灌注/基底动脉迂曲Key words
Vertebral artery hypoplasia/Posterior circulation ischemic stroke/Hypoperfusion/Basilar artery tortuous
