I remembered one of my friends in rehab suffered badly with this, she would often feel extremely dizzy when she was sat in her chair after getting up in the morning. It was so severe that often she would have to go back to her bed.
I remember it occurs from low blood pressure but i never knew its name!
This situation can happen to anyone. Usually individuals will comment that they "got up too fast". Sitting back down and getting up slower will fix the problem.
Sitting for a long period of time, taking some medications such as diuretics (water pills) or medication for high blood pressure can cause this sort of issue. Medications that have a side effect of orthostatic hypotension will have a warning label to alert you to rise more slowly. If you have low blood sugar or are diabetic, it also might happen to you more frequently. Control of your blood sugar will help to resolve the issue. Heart conditions and endocrine problems can lead to this form of low blood pressure.
Other risks factors for orthostatic hypotension are older age, heat exposure, pregnancy and alcohol consumption.
After an illness or disability, a person is often in bed for a period of time such as days or weeks as they recover. This deconditioning of the body can make it difficult for the vessels to adjust to moving to a sitting or standing position. Deconditioning of the body can affect the autonomic nervous system from reacting as quickly as it needs to respond to position changes. Adding challenging diagnoses to the autonomic nervous system such as spinal cord injury, Parkinson"s disease, Multiple Sclerosis or dementia can further aggravate the problem.
Dehydration is a significant factor in orthostatic hypotension for anyone as it is a condition where there is not enough volume in the blood to allow the body to direct it toward the brain. Combining chronic conditions, diseases and injury to the nervous system and dehydration is a double threat to experiencing this condition.
I rember very very well the first time I sat up in bed and got into a wheelchair on the ward after my surgery, it was ten days post and I hadn't had a smoke so I asked if I could go outside for a smoke. They sat me up and using a lifter got me in a chair, my God in about ten minutes of being outside I felt so sick and dizzy, could not even finish my cig, all I wanted to do was get back to bed. It took about a week for this feeling to go.
Just today I did some kneeling with my physiotherapist and my blood pressure dropped within a minute! Might have been because I haven't done it in a while but for some strange reason my blood pressure drops faster when I'm kneeling than when I'm standing. Good to know the medical term for this though