 [ Symptoms ] my mother is 72 when she stands up for a little while she wants to pass out [ Disease ] in my opinion your mother is problems are multiple system involvement due to aging process if all test results are negative including cancer remission then it is normal to have this after stroke and aging as the blood vessels and lung capabilities and capacities decrease if she can be a bit active to walk andild exercise it is going to help her usually monitor for blood pressure abnormalities plenty of water and balanced diet i hope this helps you thanks