Normally blood pressure is regulated by autonomic nerves and hormones which direct the flow blood to the desired areas and control the volume of fluid in the circulation. It is a complex system that should keep a constant supply to vital organs such as the brain and heart, whilst providing a supply to other areas when needed for everyday activities, such as eating or walking. Disorders of the autonomic nervous system may affect blood pressure regulation resulting in postural hypotension. There can be other causes for falls in blood pressure, which may require different management. The following information is recommended for use with the supervision of a qualified medical practitioner following diagnosis of postural hypotension.
Symptoms are variable but predictable which is useful for management.
When there is an increased demand for blood for activities throughout the day. In the Morning, as more urine is passed overnight and being laid flat. This lowers blood volume. Sudden Movement, particularly from lying down to sitting or standing because the regulatory mechanism cannot be activated swiftly. On Exertion, as the increased demand from exercising muscles deprives the circulation to the brain.