直立性低血压(OH)又称体位性低血压,虽少见,但可导致严重后果。自1925年Bradhury等首先描述特发性直立性低血压(FOH)以来,对其病因、病理、诊断及治疗已有较多了解。一、正常直立体位时的血液动力改变及生理调节直立位时,约有300～800毫升的血液迅速郁积于下肢,致使静脉回流减少,心排出 Orthostatic hypotension (OH), also known as orthostatic hypotension, although rare, can lead to serious consequences. Since 1925, Bradhury first described idiopathic orthostatic hypotension (FOH), its etiology, pathology, diagnosis and treatment have been more understanding. First, the normal erection when the hemodynamic changes and physiological regulation of upright position, about 300 to 800 ml of blood quickly stasis in the lower limbs, resulting in reduced venous return, cardiac output