Definitions for "Pacemakers"
are artificial devices to electrically assist in pacing the heart so that the heart may pump blood more effectively
Devices that "pace" the heart rate when it is too slow (bradycardia) can take over for the heart's natural pacemaker, the sinoatrial node, when it is functioning improperly. Pacemakers monitor and regulate the rhythm of the heart and transmit electrical impulses to stimulate the heart if it is beating too slowly.