不典型Percheron动脉梗死一例报告及文献复习

Untypical percheron artery infarct： a case report

报道l例以突发意识障碍起病,意识转清后遗留四肢活动不利,言语不利,饮水呛咳,双眼垂直运动障碍的Percheron动脉梗死病例,MRI DWI显示双侧丘脑旁正中对称性类圆形高信号,双侧中脑受累,呈加强“V”字征,磁共振动脉造影示右侧大脑后动脉环池段局部变窄,左侧胚胎型大脑后动脉（左侧大脑后动脉由同侧颈内动脉发出）,经治疗,但预后不良.

Percheron artery infarct （PAI） is uncommon clinically.One case had an acute onset of coma,impaired left limb activities,verbal incoherence,drinking cough and vertical gaze palsy after regaining consciousness.Magnetic resonance imaging （MRI） showed symmetrical high signal intensity on diffusion-weighted imaging （DWI） in bilateral paramedian thalami and a distinct pattern of V-shaped midbrain hyperintensity on DWI.Magnetic resonance angiography （MRA） showed left-sided embryonal posterior cerebral artery （PCA） from ipsilateral internal carotid artery （ICA）.Systemic treatment yielded a poor prognosis.