2. How is blood pressure measured?
2.1. What is blood pressure, and why does it fluctuate?
Your level of blood pressure is determined in the circulatory center of the
brain and adjusts to a variety of situations through feedback from the nervous
system. To adjust blood pressure, the strength and speed of the heart (Pulse),
as well as the width of circulatory blood vessels is altered. Blood vessel width
is controlled by fine muscles in the blood vessel walls.
Your level of arterial blood pressure changes periodically during heart activity:
During the "blood ejection" (Systole) the value is highest (systolic blood pres-
sure value). At the end of the heart's "rest period" (Diastole) pressure is low-
est (diastolic blood pressure value).
Blood pressure values must lie within certain normal ranges in order to pre-
vent particular diseases.
2.2. Measurement guidelines
Blood pressure is very high if your systolic blood pressure is over 160 mmHg
and/or your diastolic pressure is above 100 mmHg, while at rest. In this case,
please consult your physician immediately. Long-term values at this level endanger
your health due to continual damage to the blood vessels in your body.
If your systolic blood pressure values are between 140 mmHg and 159 mmHg
and/or the diastolic blood pressure values between 90 mmHg and 99 mmHg,
consult your physician. Regular self-checks are necessary.
If you have blood pressure values that are too low, (i.e., systolic values under
105 mmHg and/or diastolic values under 60 mmHg), consult your physician.
Even with normal blood pressure values, a regular self-check with your blood
pressure monitor is recommended. You can detect possible changes in your
values early and react appropriately.
If you are undergoing medical treatment to control your blood pressure, keep a
record of values along with time of day and date. Show these values to your
physician. Never use the results of your measurements to independently
alter the medication prescribed by your physician.
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