9.Some Useful Information about Blood Pressure

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.

Systolic blood pressure (mmHg)

 

 

 

 

Severe hypertension

 

180

 

 

 

 

 

 

 

160

 

Moderate hypertension

 

 

 

 

 

 

 

 

 

 

Mild hypertension

 

 

140

 

 

 

 

 

 

 

 

Normal systolic value

 

 

 

130

Normal blood

 

 

 

 

 

 

 

 

 

120

pressure

 

 

 

 

 

 

 

 

 

 

 

 

Optimal blood

 

 

 

 

 

 

 

pressure

 

 

 

 

 

Diastolic

 

(target value)

 

 

 

 

 

blood

80

85

90

100

110

pressure

(mmHg)

 

 

 

 

 

 

 

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.

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Omron M2 basic instruction manual Systolic blood pressure mmHg Severe hypertension