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WHAT IS THE PURPOSE OF MEASURING THE BLOOD PRESSURE AT HOME ?
Measuring the blood pressure as well examination by a doctor in the hospital or in a clinic tends
to an increase in the nervousness in many patients, which causes higher blood pressure. The
blood pressure can also vary under various circumstances and therefore an objective judgment
on the basis of a single measurement is not possible.
The blood pressure measured in the morning or after getting up and before having breakfast of
a patient sitting still is defined as the fundamental blood pressure. Therefore a blood pressure
measurement at home is advisable, because the blood pressure in this state is the nearest to it.
A. Blood pressure classification of WHO
The standards for defining the high and low blood pressures,
irrespective of the age have defined by the World Health
Organization (WHO) as shown in Fig.1
B. Variations in the blood pressure
The individual blood pressure is subject to variations on a daily
basis or according to the season. These variations are more
distinct in patients with high blood pressure. Normally, the blood
pressure rises during work while it is at its
lowest at night during sleep.
The variations of the blood pressure during the
day are shown in Fig. 2, the readings having
been taken every 5 minutes.
The thick line shows the sleeping period. The
rise in the blood pressure at 4 o’clock in the
morning (shown as A in the figure) and at 12
o’clock noon (shown in the figure as B) shows
an attack of pain.
180 189 mmHg
Systolic Blood Pressure
Diastolic Blood Pressure
85
89
NORMAL
HIGH NORMAL
HYPERTENSION
Fig. 1
A
B
12 13 14 15 16 17 18 19 20 21 22 23 24 1 2 3 4 5 6 7 8 9 10 11
Time
160
140
120
100
80
60
40
20
Blood Pressure mmHg
Fig. 2
BM101 10/16/06 12:15 PM Page 15