things to know about blood pressure
3
What are systolic pressure and diastolic pressure?
When ventricles contract and pump blood out of the heart, blood pressure reaches its maximum value, the highest pressure in the cycle is
known as systolic pressure. When the heart relaxes between heartbeats, the lowest blood pressure is diastolic pressure.
What is the standard blood pressure classification?
The blood pressure classification published by World Health Organization (WHO) and International Society of Hypertension (ISH) in 1999 is
as follows:
CAUTION:
Only a physician can tell your normal blood pressure range. Please contact a physician if your measuring result falls out of the range. Please
note that only a physician can tell whether your blood pressure value has reached a dangerous point.
Blood pres-
sure (mmHg)
Hypotonia
(degraded
bl. pr.)
Optimal Normal High normal Mild
hypertension
(Grade I)
Moderate
hypertension
(Grade II)
Severe
hypertension
(Grade III)
SYS < 105 106-120 120-129 130-139 140-159 160-179 > 180
DIA < 60 < 60-80 80-84 85-89 90-99 100-109 > 110
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