orthostatic
adjective medical specialized uk/ˌɔː.θəʊˈstæt.ɪk/ us/ˌɔːr.θəˈstæt̬.ɪk/
直立的
relating to standing up straight
If you feel that your blood pressure changes because of the posture and position you are holding, you may be suffering from orthostatic hypotension. 如果你觉得你的血压因你的身体姿态和位置而改变，你有可能患有直立性低血压。