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How To Take Blood Pressure. The patient should sit or lie comfortably. The arm should be fully supported on a flat surface at heart level. (If the armâs position varies, or is not level with the heart, measurement values obtained will not be consistent with the patientâs true blood pressure).
Having high blood pressure (hypertension) is not usually something that you feel or notice. It does not tend to produce obvious signs or symptoms. The only way to know what your blood pressure is, is to have it measured. Blood pressure is measured in âmillimetres of mercuryâ (mmHg) and is written as two numbers. For example, if your reading is 120/80mmHg, your blood pressure is â120 over 80â.