Categories for Blood Pressure Levels in Adults
Source: National Heart, Lung, and Blood Institute. (2005). What is high blood pressure? Online: http://www.nhlbi.nih.gov/hbp/detect/categ.htm.
On this slide you can see the categories or classifications for determining blood pressure levels in adults, and these, it's important to note, are based on two or more properly-measured blood pressure readings on two or more office visits, so we're talking about a sustained high level of blood pressure, not just a one-time reading, that should be used to classify someone as normal, pre-hypertensive or high blood pressure.