Citizen CH-617 Manual De Instrucciones página 8

B. 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.
(Direct arterial pressure recording in unrestricted
man. Beven, Honour & Stott: Clin. Sci. 36:329.
1969)
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* Figure No.2