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IV. Miscellaneous
Knowledge on Blood Pressure
Your heart is just like a pump which causes the
blood to circulate through all vessels. As a result,
the blood pressure is the pressure on the wall of
the blood vessel pressed by blood. The output of
blood from the heart when it is a systole is called
systolic pressure. The blood returning to the heart
when it is a diastole is called diastolic pressure.
Blood pressure fluctuates continually — day and night. The highest value
usually appears in the daytime and lowest one usually at midnight. Typi-
cally, the value begins to increase at around 3:00AM, and reaches to high-
est level in the daytime while most people are awake and active.
For this reason it is recommended to measure your blood pressure each day
at the same time.
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