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About Blood Pressure
WHO Blood Pressure Classifications
Standards for assessment of high blood pressure, without regard to age, have
been established by the World Health Organization (WHO), as shown in this
chart.
Variations in Blood Pressure
Individual blood pressures vary greatly both on a daily and a seasonal basis.
These variations are even more pronounced in the hypertensive patient. Normally
the blood pressure rises while at work and is at its lowest during the sleeping
period.