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7. Some Useful Information about Blood PressureClassification 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 100mmHg 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)