Orthostatic intolerance may be defined as "the development of symptoms during upright standing relieved by recumbency." Although the use of a term such as orthostatic intolerance logically implies the presence of findings when upright, typically, variations in blood flow and blood pressure (BP) regulation are also found when supine or sitting, but these may require special equipment to detect and therefore may not be easily apparent requiring orthostatic stress to become evident.

Orthostatic intolerance (OI) is a common clinical problem; however, effective and applicable clinical prevention/treatment is limited. To investigate whether electroacupuncture (EA) is a novel effective treatment in attenuating OI in healthy individuals,Chinese Fourth Military Medical University has done a research about this.

They found that Electroacupuncture at PC-6 is effective in improving orthostatic tolerance. Cardiac function improvement and sympathetic activation are responsible for the improved orthostatic tolerance after EA. EA represents a novel intervention against OI.
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Reference:Sun J, Sang H, Yang C, Dong H, Lei C, Lu Y, Ma Y, Zhou X, Sun X, Xiong L. Europace. 2012 Jul 11.