昏厥亦称晕厥,是由于脑部暂时缺血或缺氧所致的一种突发的、短暂的意识丧失,历进数秒至数分钟,发作时不能站立。昏厥与昏迷不同,昏迷意识丧失时间长,恢复较慢。 昏厥常发生于直立时,发作前可有头晕、恶心、出冷汗等前驱症状。发作轻时仅有短暂的意识模糊,重时意识丧失时间较长,并伴有肢体、躯干的抽动和尿失禁。 Syncope, also known as syncope, is a sudden, transient loss of consciousness due to temporary ischemia or hypoxia in the brain, which can take several seconds to minutes and can not stand up during an episode. Different fainting and coma, unconsciousness loss of a long time, slow recovery. Fainting often occurs in upright, before the attack may have dizziness, nausea, cold syndrome and other precursors. Only a brief episode of the onset of confusion, loss of consciousness when the weight of a longer time, accompanied by limbs, trunk tics and urinary incontinence.