晕厥(syncope)是指突然发作的短暂的意识丧失,同时伴有肌张力丧失而不能维持一定的体位;临床上有时部分患儿在某些特殊体位或诱发因素下,出现一过性黑朦,体张力丧失或减低,但不伴意识丧失,这种情况称为近乎晕厥(near-syncope或pre-syncope)。晕厥常常持续几秒种至几分钟自行恢? Syncope refers to a sudden episode of loss of consciousness, accompanied by loss of muscle tension and can not maintain a certain body position; clinically, some children in some special circumstances or predisposing factors, transient transient darkness, Loss or loss of body tension without loss of consciousness, a condition known as near-syncope or pre-syncope. Syncope often lasting a few seconds to a few minutes to self-recovery?