heart and blood vessel disorders
Low Blood Pressure
Changing the volume of blood
The higher the volume of blood in the arteries, the higher the blood pressure—as long as the width of the arteries remains constant. The volume of blood in the arteries is affected by How much fluid is in the body (hydration) Whether very small arteries leak fluid (for example, if protein levels in the blood are very low and/or there is damage to the interior wall of the small arteries, fluid will leak from them into the tissues) How much fluid the kidneys remove from the blood to excrete in the urine Certain drugs, particularly diuretics (drugs that help the kidneys remove water from the body) 