Arthur Blank, a co-founder of Home Depot and owner of the Atlanta Falcons. His familyâs foundation has donated $20 million for community improvements near the Falconsâ new stadium. Credit Kevin D. Liles for The New York Times.
A diagnosis of unstable blood pressure can be caused by a multitude of factors, illnesses and disease processes. Unstable blood pressure can provoke a variety of symptoms, including but not limited to dizziness, shortness of breath, instability, fainting and erratic heart rhythms.
Symptoms of low blood pressure caused by conditions or diseases depend upon the specific cause of the low blood pressure. For example, if insufficient blood flows to the brain, brain cells do not receive enough oxygen and nutrients, and a person can feel lightheaded, dizzy, or even faint. If the blood pressure is already low, standing can make the low pressure worse, to the point of causing symptoms. 2  The development of lightheadedness, dizziness, or fainting upon standing caused by low blood pressure is called orthostatic hypotension.