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Elderly man wearing a 24-hour blood pressure monitor. The device consists of a battery-operated monitor (blue box on the patient's belt), long flexible tubing (running around the patient's neck), and an inflatable cuff (on the patient's left arm). The monitor automatically inflates the cuff at regular intervals, recording the patient's blood pressure. These recordings are evaluated by a medical professional. This kind of device is used to follow blood pressure fluctuations during a 24-hour period in order to prescribe appropriate medication to prevent the risk of a heart attack or a stroke. In some people the blood pressure may be as high as 200/100 mm Hg at night (hypertension) and then drop to below 90/55 mm Hg (hypotension) during the day, while the.
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