My 83 yeat old mother was admitted to the hospital with blood pressure that was going from 214/85 to 74/ 34 within about an hour or so.This was just laying down. The ER was monitoring this back and forth for a few hour and decided to admit her. She has become orthostatic in the last few months following a back surgery,but the big back and forth has only been in the last week. She never gets headaches but now she feels a band around her head when its high and feels light headed and faint when it is low. And she sweats up periodicly for no apparent reason. All the blood work, ct scan, abdominal test,(she has an arortic anurysm), and heart and kidney test have come back OK.A few months ago, a vascular DR found a blockage in an artery in her kidney and wanted to do a stent. she was weak after her back procedure and wanted to go home. He said it was OK to wait. Now no one is talking about that procedure. Could that be whats causing the BP problem? She has been there 3 days with changeing meds and no one really seems to know.