cardiac monitor, heart monitor - a piece of electronic equipment for continual observation of the function of the heart

cathode-ray tube, 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

electronic equipment - equipment that involves the controlled conduction of electrons (especially in a gas or vacuum or semiconductor)

monitor, monitoring device - display consisting of a device that takes signals from a computer and displays them on a CRT screen

microwave radar, radar, radio detection and ranging, radiolocation - measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects