The following are standard guidelines for assessing blood pressure (the healthy range has been lowered in recent years).
Standard Blood Pressure Guidelines / mmHg (millimeters of mercury)
Low less than 89/ less than 50
Normal less than 120 / less than 80
Prehypertension 120–139 / 80–89
Hypertension
Mild 140–159 / 90–99
Moderate 160–179 / 100–109
Severe >180 / >110
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