A peacemaker is a small battery-operated device that is surgically implanted in the chest to control the heartbeats of the patient. It is also referred to as a cardiac pacing device.
A pacemaker becomes active only when it detects an abnormality in your heartbeat. If the patient has bradycardia, the pacemaker will generate electrical impulses to make sure that the patient's heart is beating at a normal rate.
A single chamber pacemaker is used for single chamber pacing, which means that only the right atrium or the right ventricle is paced. This involves the use of a single pacing lead.
A dual-chamber pacemaker is used for dual-chamber pacing, i.e. both the right atrium and right ventricle are paced simultaneously
A leadless pacemaker is a tiny device, which is 90% smaller than a normal pacemaker. It has a self-contained generator and electrode system which is directly implanted in the right ventricle