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ABOUT “BLOOD PRESSURE”
What is blood pressure?
The heart is a pump that circulates blood throughout your body. Blood
is pumped from the heart at a constant pressure into arteries. This
pressure is called the arterial blood pressure and represents, in general
terms, your blood pressure. Blood pressure is indicated by several kinds
of pressures, including the systolic pressure that occurs when the heart
pumps blood and the diastolic pressure that occurs when blood returns
to the heart.
(Systolic)
(Diastolic)
Artery Artery
Left atrium
Left
ventricle
Left atrium
Left
ventricle
Dilation
The artery wall expands.
Contraction
Normal state is restored
to the artery wall.
Your blood pressure changes all the time.
Your blood pressure differs according to your age, gender and a range of
other factors. It is likely to be affected by your biorhythm during the day
and by your posture, physical activities, mental activities, level of stress
and even by the air temperature. The blood pressure of a healthy person
generally varies within a day.
Blood pressure value (mmHg)
Time of day
Systolic blood pressure
Diastolic blood pressure
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