What is blood pressure and how is it measured?
https://www.ncbi.nlm.nih.gov/books/NBK279251/
WebJun 24, 2010 · Blood pressure is measured in units of millimeters of mercury (mmHg). The readings are always given in pairs, with the upper (systolic) value first, followed by the lower (diastolic) value. So someone who has a reading of 132/88 mmHg (often spoken “132 over 88”) has a. systolic blood pressure of 132 mmHg, and a. diastolic blood pressure of 88 …
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