Origin: Greek suffix -graph
Cardiograph has 3 different meanings across 1 category:
medical instrument that records electric currents associated with contractions of the heart
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
an instrument which, placed in contact with the chest, graphically registers the comparative duration and intensity of the heart's movements