What Is Blood Pressure
Blood pressure is the force used by circulating blood on the walls of blood vessels, and is one of the vital signs of the main details of life, which also included heart rate, respiration rate, and temperature. Blood pressure produced by the heart that pumps blood into the arteries and regulated by the response by the arteries to blood flow.
Individual blood pressure is expressed as systolic blood pressure / diastolic, for example, 120/80. Systolic blood pressure (figure above) represents the pressure in the arteries when the heart muscle to contract and pump blood into it. Diastolic blood pressure (figure below) represents the pressure in the arteries when the heart muscles relax (relax) after he contracted. Blood pressure always is higher when the heart is pumping than when he was relaxed (relaxed).
Systolic blood pressure for most healthy adults falls between 90 and 120 millimeters of mercury (mm Hg). Normal diastolic blood pressure falls between 60 and 80 mm Hg. Current directives define normal blood pressure lower than 120/80. Blood pressure above 130/80 is considered high. High blood pressure increases the risk of developing:
- Heart disease,
- Kidney disease,
- Hardening of the arteries (atherosclerosis or arteriosclerosis),
- Damage to the eyes, and
Low blood pressure (hypotension) is pressure so low that causes symptoms or signs caused by low blood flow through arteries and veins. When blood flow is too low to deliver oxygen and nutrients are sufficient to vital organs such as brain, heart, and kidney, organs do not function normally and may be damaged permanently.
Unlike high blood pressure, low blood pressure is determined mainly by the signs and symptoms of low blood flow and not by the specific number of blood pressure. Some individuals may have a blood pressure of 90/50 with no symptoms of low blood pressure and therefore do not have low blood pressure. However, others who normally have high blood pressure may develop symptoms of low blood pressure if their blood pressure fell to 100/60.
Diastolic To Low