- noun a device that produces a visual record of the heart’s electrical activity via electrodes placed on the patient’s chest
- An instrument which detects and records variations in the electrical activity of the heart. An electrocardiogram is the graphical recording of this activity. Its abbreviation is ECG, or EKG. Also called cardiograph.
- noun an apparatus for measuring and recording the electrical impulses of the muscles of the heart as it beats
- noun a graph showing the behaviour of the heart by recording its electrical voltage, produced by a device called an electrocardiograph.