MIRIAM MASLO / SCIENCE PHOTO LIBRARY MIRIAM MASLO / SCIENCE PHOTO LIBRARY
Blood pressure gauge. A device that measures blood pressure is called a sphygmomanometer. This analogue gauge measures from 0 to 300 millimetres of mercury (mmHg) pressure. Normal blood pressure is in the range of 120/80 mmHg, where the higher value (systolic pressure) is that of the beat and the lower (diastolic) pressure is that of the heart at rest between beats. Blood pressure is an important measure of health. High blood pressure (hypertension) is a risk factor for heart disease and strokes.
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