Named after Georg Simon Ohm (1789 – 1854), a German physicist and mathematician who observed that electrical current (the flow of electrons) was a directly proportional to the Voltage and inversely proportional to the Resistance of the conducting material (in the case of pacemakers, usually an pacemaker lead).

His observations were empiric based on his work on the newly developed  voltaic cells developed by the Italian,  Alessandro Volta (1745 – 1827). Materials that observe this property are said to be Ohmic.