Neuron Structure. Your brain is made of approximately 100 billion nerve cells, called neurons. Neurons have the amazing ability to gather and transmit electrochemical signals -- think of them like the gates and wires in a computer.
Most doctors will only consider chronically low blood pressure as dangerous if it causes noticeable signs and symptoms, such as: 1  Dizziness or lightheadedness. 2  Nausea. 3  Fainting (syncope)  Dehydration and unusual 1  thirst. Dehydration can sometimes cause blood pressure to drop.  Lack of 1  concentration. Blurred vision.  Cold, clammy, pale skin.
Low Blood Pressure and the Heart. The heart is a muscle that works as a pump and is controlled by electrical signals. Problems with either the pump or the electricity can cause problems with low blood pressure. 1  If the heart beats too quickly, blood pressure may fall because there isn't enough time for the heart to refill in between each beat (diastole).