An artificial pacemaker (not to be confused by the heart’s natural pacemaker) is a medical device that delivers electrical impulses to regulate the beating of the heart. The main reason for needing a pacemaker is when a person’s heart rate is too slow (bradycardic) either because the natural pacemaker of the heart is not fast enough, or there is a block in the heart’s electrical conduction system. Modern pacemakers are able to be checked externally and the pacing modes can be modified at any stage by a Cardiologist if required. Pacemakers are inserted in a Cardiac Catheterisation Laboratory by a Cardiologist.