ART & SCIENCE, INC. / CUSTOM MEDICAL STOCK PHOTO / SCIENCE PHOTO LIBRARY ART & SCIENCE, INC. / CUSTOM MEDICAL STOCK PHOTO / SCIENCE PHOTO LIBRARY
High blood pressure. Artwork showing the cuff of a sphygmomanometer wrapped around the upper arm of a man aged about 50. His heart is drawn in position, with the blood pressure reading (140/90 mmHg) underneath. A sphygmomanometer measures the pressure in an inflated cuff needed to stop blood flowing into the arm. The two readings - 140 and 90 - correspond to pressure during a heartbeat and that between beats. A healthy adult typically has a reading of about 110/75 mmHg. Hypertension, or abnormally high blood pressure, is over 140/90 mmHg. Blood pressure tends to increase with age, raising the risk of heart disease and stroke.
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