Low Blood Pressure (Hypotension)
View Table of Contents
- Low blood pressure facts
- What is low blood pressure?
- What is low blood pressure? (Continued)
- How is blood pressure generated?
- How does the body maintain normal blood pressure?
- What are low blood pressure symptoms and signs?
- Causes of low blood pressure: Dehydration, bleeding, and inflammation
- Causes of low blood pressure: Heart disease
- Low blood pressure causes: Medications
- Other caues of low blood pressure
- How is low blood pressure diagnosed and evaluated?
- What is the treatment for low blood pressure?
What is low blood pressure?
Blood pressure is the force exerted by circulating blood on the walls of blood vessels. It constitutes one of the critically important signs of life or vital signs which include heart rate, breathing, and temperature. Blood pressure is generated by the heart pumping blood into the arteries modified by the response of the arteries to the flow of blood.
An individual's blood pressure is expressed as systolic/diastolic blood pressure, for example, 120/80. The systolic blood pressure (the top number) represents the pressure in the arteries as the muscle of the heart contracts and pumps blood into them. The diastolic blood pressure (the bottom number) represents the pressure in the arteries as the muscle of the heart relaxes following its contraction. Blood pressure always is higher when the heart is pumping (squeezing) than when it is relaxing.