本文综述了一过性黑朦(AF)作为脑血管功能不全的一个危险信号观点的有关文献,和对存在症状性脑梗塞病人的危险。AF的特征是:突然、无痛、单眼视力丧失,典型发作持续约1～15分钟。病人多描述其视力为“黑暗”或“模糊”,通常发作后立即恢复正常。常见的AF原因是栓塞、血管动力学变化或血管痉挛。66％的病人栓子来源不能确定,27％似单是由于颈动脉损伤,而心源性栓子仅占原因的2％。最近研究表明, This article reviews the literature on the transient darkness (AF) as a dangerous signal point of view of cerebrovascular insufficiency and the danger to patients with symptomatic cerebral infarction. AF is characterized by sudden, painless, monocular loss of vision, typical episodes last about 1 to 15 minutes. More patients describe their vision as “dark” or “vague”, usually returned to normal immediately after the attack. A common cause of AF is embolism, changes in vascular dynamics or vasospasm. 66% of patients can not determine the origin of emboli, 27% seems to be due to carotid artery injury, and cardiogenic emboli accounted for only 2% of the reasons. Recent research shows that,