突然不省人事而晕倒,出现暂时的意识丧失状态,在临床上称之为“晕厥”。值得注意的是,晕厥与昏迷、眩晕的症状不同。发生昏迷时,通常人出现意识障碍持续时间会较长;而眩晕则仅感到自身和周围景物旋转,一般无意识障碍。晕厥的致病原因主要是心脏和血管功能障碍。由于心脏输出的 Sudden unconsciousness and fainted, there is a temporary loss of state of consciousness, clinically called “syncope.” It is noteworthy that, fainting and coma, the symptoms of dizziness are different. In the event of coma, usually people have longer duration of consciousness disturbance; and dizzy only feel the rotation of their own and the surrounding scene, the general unconsciousness. The main cause of syncope is the heart and vascular dysfunction. Due to the output of the heart