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|Noun||1.||cardiac monitor - a piece of electronic equipment for continual observation of the function of the heart|
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
cardiograph, electrocardiograph - medical instrument that records electric currents associated with contractions of the heart
monitor - a piece of electronic equipment that keeps track of the operation of a system continuously and warns of trouble