I sent a previous message today, I am a 62yo female with history of high cholesterol (now with LDL of 104),chronic lymphocytic leukemia (never been treated, only followed by oncologist thus far) history of migraines but none in past 15 yrs or so, currently being evaluated for MS. Also a long time smoker. Concern is aneurism or atherosclerosis could be affecting blood flow during position change. Is that possible? Not sure what to ask MD.