SHEILA TERRY / SCIENCE PHOTO LIBRARY SHEILA TERRY / SCIENCE PHOTO LIBRARY
Ambulatory blood pressure monitor. Man filling in a crossword puzzle whilst wearing an ambulatory blood pressure monitor. This device allows measurement of a patient's blood pressure at home or at work, over an extended period. Such measurement avoids the "white coat effect" in which the blood pressure rises significantly when it is measured in a clinical setting. High blood pressure (hypertension) may be caused by kidney disease, hormonal disorders and congenital problems and if left untreated can lead to heart and kidney failure. Low blood pressure (hypotension) can result from a heart attack, a severe infection or acute abdominal conditions.
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