6. Some Useful Information about Blood Pressure
30
Classification of Blood Pressure by the World Health Organization
The World Health Organization (WHO) and the
International Society of Hypertension (ISH)
developed the Blood Pressure Classification
shown in this figure.
This classification is based on the blood
pressure values measured on people in a sitting
position in outpatient departments of hospitals.
Note:
There is no universally accepted definition of
hypotension. However, those having the systolic
pressure below 100 mmHg are assumed as
hypotensive.
80
180
160
140
130
120
85
90
100
110
Systolic blood pressure
(mmHg)
Severe hypertension
Moderate hypertension
Mild hypertension
Normal systolic value
Normal blood
pressure
Optimal blood
pressure
(target value)
Diastolic
blood
pressure
(mmHg)
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