#cardiac_monitor__cardiacmonitor__heart_monitor__heartmonitor  a piece of electronic equipment for continual observation of the function of the heart
  supertype:  #monitor  a piece of electronic equipment that keeps track of the operation of a system continuously and warns of trouble
  part:  #ballistocardiograph__cardiograph  a medical instrument that measures the mechanical force of cardiac contractions and the amount of blood passing through the heart during a specified period by measuring the recoil of the body as blood is pumped from the ventricles
  part:  #cardiograph__electrocardiograph  medical instrument that records electric currents associated with contractions of the heart
  part:  #cathode-ray_oscilloscope__cathoderayoscilloscope__oscilloscope__scope__CRO  electronic equipment that provides visual images of varying electrical quantities
     part:  #cathode-ray_tube__cathoderaytube__CRT  a vacuum tube in which a hot cathode emits a beam of electrons that pass through a high voltage anode and are focused or deflected before hitting a phosphorescent screen
        part:  #electron_gun  the electrode that is the source of electrons in a cathode-ray tube or electron microscope; consists of a cathode that emits a stream of electrons and the electrostatic or electromagnetic apparatus that focuses it
        part:  #CRT_screen__screen  display on the surface of the large end of a cathode-ray tube on which is electronically created
           part:  #foreground.window  (computer science) a window for an active application

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