myocardiograph

1. (medicine) An instrument that records the movement of heart muscle.Examples: "Small myocardiographs recording by means of Frank capsules were used in the experiments here described, and the arrangement of the apparatus was essentially the same as described by Wiggers (2) and used for analyzing the contraction process in mammalian auricle."; "From above down: amplitude of cardiac contractions (recorded my means of a myocardiograph with pneumatic transmission), blood pressure, […]"; "Heart contractions are usually recorded with a Cushny myocardiograph sewn to the wall of the left ventricle and attached to a simple quasi-isometric lever system."