5
About Blood Pressure
A.
AHA blood pressure classifications:
Standards for assessment of high or low blood pressure without
regard to age, have been established by the American Heart
Association (AHA 2017), as shown in the below chart.
BLOOD PRESSURE CATEGORY
SYSTOLIC mm Hg
(upper number)
DIASTOLIC mmHg
(lower number)
NORMAL
LESS THAN 120
and
LESS THAN 80
ELEVATED
120-129
and
LESS THAN 80
HIGH BLOOD PRESSURE
(HYPERTENSION)STAGE 1
130-139 or 80-89
HIGH BLOOD PRESSURE
(HYPERTENSION)STAGE 2
140 OR HIGHER
or
90 OR HIGHER
HYPERTENSIVE CRISIS
(consult your doctor immediately)
HIGNER THAN 180 or
HIGHER THAN 120
However the above chart is not exact for classification of blood
pressure and it's intended to be used as a guide in
understanding non-invasive blood pressure measurements.
Please consult with your physician for proper diagnosis.
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 AM (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)
