小儿晕厥的常见病因

晕厥表现为一过性脑供血不足所致短暂的意识丧失状态,常伴有肌张力降低而不能维持一定的体位.晕厥是儿童临床常见病症之一,其原因复杂,包括神经介导性(反射性)晕厥、脑血管疾病所致晕厥、精神性晕厥、心源性晕厥、代谢性晕厥、不明原因晕厥等;其中神经介导性晕厥为较常见的病因,而血管迷走性晕厥是此类晕厥中最常见的类型;心源性晕厥虽然发病率低,但其起病急骤、凶险,而应重视.

Common causes of syncope in children

Syncope is a temporary loss of consciousness state caused by the transient cerebral insufficiency,often accompanied by decreased muscle tone and failure in maintaining a certain position. Syncope is a common clinical disease of children,the causes of which include nerve-mediated (reflex) syncope,cerebral vascular disease syncope, psychogenic syncope, cardiac syncope, metabolic syncope, unexplained syncope,etc. Nerve-mediated syncope is the most common cause, and vasovagal syncope is the most common type. Al-though the incidence of cardiogenic syncope is low, but its onset is abrupt and dangerous, which should be payed attention.