9.Some Useful Information about Blood Pressure
200 |
| Upper curve: systolic blood pressure | |
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| Lower curve: diastolic blood pressure | |
150 |
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mmHg |
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100 |
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50 |
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6 | 12 | 18 | 24 |
Time of day
Example: fluctuation within a day (male, 35 years old)
Classification of Blood Pressure by the World Heath 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)
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| Severe hypertension |
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180 |
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160 |
| Moderate hypertension |
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| Mild hypertension |
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140 |
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| Normal systolic value |
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130 | Normal blood |
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120 | pressure |
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Optimal blood |
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| pressure |
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| Diastolic | |
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| blood | |
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| pressure | |
80 | 85 | 90 | 100 | 110 | ||||
(mmHg) | ||||||||
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This classification is based on the blood pressure values measured on people in a sitting position in outpatient departments of hospitals.
*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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