This was not a smooth process. The rise of executive power sometimes hurt important interests and always rubbed against the republican sensibilities that Americans inherited from the founders. From time to time, Congress reaped political benefits from thwarting the president. But today Congress reacts rather than leads.
Some of the causes of low blood pressure include: 1  Getting up after you sit or lie down. 2  This can cause a quick drop in blood pressure called orthostatic hypotension. 3  Standing for a long time. 4  Not drinking enough fluids (dehydration).
Abnormally low blood pressure may be associated with a number of different causes, such as: 1  vasovagal syncope (the common type of fainting brought on by stress or pain); 2  hypoaldosteronism (deficiency of a steroid hormone produced by the adrenal glands, as can occur with Addison's disease); and. 3  Parkinsonâs disease.