artificial pacemaker
Noun
Meaning
an implanted electronic device that takes over the function of the natural cardiac pacemaker
Source: WordNetSynonyms
Hypernyms
Examples
A pacemaker can be a natural pacemaker of the heart (the sinoatrial node) or it can be an electronic device that serves as an artificial pacemaker.
Very ill patients that are not responding to medical therapy may require implantation of an artificial pacemaker, and will be hospitalized prior to surgery in preparation of it.