adjective. Relating to or caused by standing upright.

Of or pertaining to an upright position.

adjective. Of, or relating to upright posture.

adjective. Of, or relating to an orthostat.

adjective. pertaining to an upright standing posture

"This kind of position-related drop in blood pressure - a condition known as orthostatic hypotension - is pretty common and is usually linked to dehydration or overmedication."

orthostatic albuminuria  

erect  upright  vertical  

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