cardiograph Meaning, Definition & Usage

noun medical instrument that records electric currents associated with contractions of the heart
electrocardiograph.
noun 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
ballistocardiograph.

Gr. heart + -graph.

(Med.) An instrument which, when placed in contact with the chest, will register graphically the comparative duration and intensity of the heart's movements.