Artificial Heart That Gave Human Pump "Vacation"--The small black box with glass tubes in the center of the picture is the machine which recently took over "complete function of maintaining blood supply to the body" of a 41-year-old patient for 50 minutes at Harper Hospital here while the patient's heart was opened and worked on by surgeons. The mechanical device empties the patient's heart of blood and enables surgeons to use direct vision rather than "blind" sense of touch in heart surgery. This picture was made while surgeons in background tried the operation of the device on a dog. Medical researchers said this was believed the first known instance of a patient's

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