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14
Blood circulation
The blood circulation is responsible for supplying the
body with oxygen. Blood pressure is the pressure
exerted on the arteries.
The systolic blood pressure value (higher pressure
or top value) represents the blood pressure
produced by contraction of the heart muscle.
The diastolic blood pressure value (lower pressure
or lower value) represents the blood pressure
produced by relaxation of the heart muscle.
Classification of blood pressure
The World Health Organisation (WHO) and the
International Society of Hypertension (ISH)
developed the blood pressure classification.This
classification is based on the blood pressure values
measured while sitting on a chair in the outpatient
department of a hospital. According to the blood pressure classification by the WHO/ISH.
General information about blood pressure
Optimal blood
pressure
(target value)
Normal blood
pressure
Normal systolic value
Mild hypertension
Moderate hypertension
Severe hypertension
Systolic blood pressure
(mmHg)
Diastolic
blood
pressure
(mmHg)
80
180
160
140
130
120
85 90 100 110
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