体位性低血压是一种常见的临床问题,多见于少年和老年人。休位性低血压可出现于下列情况: ①健康青年长时间站立可发生昏晕。妊娠、贫血、体力衰竭和静脉曲张可加剧之。②老年人体位性晕厥并不少见,据认为系脑血流自动调节丧失所致。20％的65岁以上老年人有体位性血压下降(下降20毫米汞柱或以上)。 Postural hypotension is a common clinical problem, more common in adolescents and the elderly. Recessive hypotension can occur in the following situations: ① healthy young people can stand for a long time can be dizzy. Pregnancy, anemia, physical failure and varicose veins can be exacerbated. ② elderly people with positional syncope is not uncommon, it is believed that Department of cerebral blood flow caused by the loss of automatic regulation. 20% of people over the age of 65 have decreased orthostatic blood pressure (20 mm Hg or more).