The graphical representation of [[heart_(organ)|heart]] activity, commonly measured by echo- or electrocardiography. It consists of a line with spikes and valleys directly related to the health, emotional and activity state of the individual being studied.

h4. External links
* "Wikipedia: Electrocardiography":[https://en.wikipedia.org/wiki/Electrocardiography]
ECG EKG 心電図 心电图