本征系指以特发性直立性低血压、明显出汗,皮肤潮红、指趾端发绀、周期性呕吐等为特征的综合征而言的。本征比较少见,具有家族性,并且多见于犹太人。本征病因尚无定论。许多临床研究表明:是交感、副交感神经化学介质的生成、释放、贮存、代谢发生了障碍,从而影响植物神经的兴奋和抑制过程,引起植物神经功能异常。在上述过程中化学介质中儿茶酚胺,特别是去甲肾上腺素的合成减低。 Intrinsic refers to the idiopathic orthostatic hypotension, significant sweating, skin flushing, toe-side cyanosis, periodic vomiting and so characterized for the syndrome in terms of. Less common, familial, and more common with Jews. The etiology of etiology is inconclusive. Many clinical studies have shown that: sympathetic, parasympathetic chemical media generation, release, storage, metabolism obstacles, thus affecting the excitement and inhibition of autonomic nervous system, causing autonomic dysfunction. The synthesis of catecholamines, especially norepinephrine, in the chemical medium is reduced in the above process.