electrocardiogram (ECG, EKG)
> καρδία /kardia (=heart) which derived according Meletios(7th-8th cen AD) probably from verb κραδαίνω/kradeno (=rattle, rock)
The word electric was first used but was Wiliam Gilbert (1600) who coined the latin word electricus from Greek word ήλεκτρον/electron in order to describe materials like amber that attracted other objects.
The term electrocardiogram was coined by Willem Einthoven in 1893 at the Dutch Medical Society meeting. In 1924, Einthoven received the Nobel Prize for his life's work in developing the ECG.
A non-invasive graphic record of the heart's integrated action currents.