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HEM-7301-ITKE_main.book Page 42 Friday, October 3, 2008 12:42 PM
10.Some Useful Information about Blood Pressure
Upper curve: systolic blood pressure
200
Lower curve: diastolic blood pressure
150
100
50
6
12
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)
180
160
140
Normal systolic value
130
Normal blood
120
Optimal blood
pressure
(target value)
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.
42
18
24
Severe hypertension
Moderate hypertension
Mild hypertension
pressure
Diastolic
blood
pressure
80
85
90
100 110
(mmHg)
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