5
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.
23222120 11101918171615141312
140
120
100
80
60
40
20
160
24 8765432
blood pressure (mmHg)
Time
A B
(Direct arterial pressure recording in unrestricted man.
Beven, Honour & Stott: Clin. Sci. 36:329. 1969)
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