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Paramedics can now be alerted instantly if a patient has a heart attack or a
stroke at home. A sensor developed at the University of Tokyo has electrodes to
monitor the heart, accelerometers to monitor movement and inclinometers that
indicate posture. Weighing 100 grams, the device is the size of a pack of cards
and is worn externally. The sensor relays information to a nearby computer,
which analyses the signals. If it detects a sudden movement such as a fall, the
computer sends an alarm signal by modem to a nearby hospital.