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直立性低血壓[1](orthostatic hypotension)又稱體位性低血壓[2](postural hypotension),是因因血壓調節反射異常導致的直立後血壓異常下降的現象,臥姿時血壓通常會恢復正常。直立性低血壓可引起腦供血不足症狀,如頭暈、乏力、視物模糊、面色蒼白、黑矇、暈厥等。可應用血管收縮藥物進行治療。直立性低血壓多出現在中老年患者身上,男性發病率高於女性[3]。
直立性低血壓有許多異名:起立性低血壓[4]、姿勢性低血壓、姿態性低血壓、姿位性低血壓等。
相對地,另有平臥時血壓反而降低的姿位性低血壓。
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