electrogram
/ɪˈlɛktrə(ʊ)ɡram/noun
1 Meteorology. A graphical record or chart showing variations in the potential gradient in the atmosphere.
2 Medicine. A record of the electrical activity of an organ, especially the heart; specifically such a record made from electrodes placed directly on or within the heart or other organ.
Origin
Late 19th century. From electro- + -gram.