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Variations in blood pressure:
Individual blood pressures vary greatly both on a daily and a
seasonal basis. These variations are even more pronounced in hyper
tense patients. Normally the blood pressure rises while at work and
is at its lowest during sleeping period.
(hyper tense: means a person who has high blood pressure symptom.)
The graph below illustrated the variations in blood pressure over a
whole day with measurement taken every five minutes.
The thick line represents sleep. The rise in blood pressure at 4 PM (A in
the graph) and 12 PM (B in the graph) correspond to an attack of pain.
Time
(Direct arterial pressure recording in unrestricted man.
Beven, Honour & Stott: Clin. Sci. 36:329. 1969)
A B
Blood Pressure (mmHg)
12 13 14 15 16 17 18 19 20 21 22 23 24 1 2 3 4 5 6 7 8 9 10 11
160
140
120
100
80
60
40
20
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