Pacemaker for Bradycardia Treatment Overview Back to top A
pacemaker is a small battery-powered device that sends weak
electrical impulses to "set a pace" so that the heart is able to
keep a regular heartbeat. There are different types of
pacemakers, so your doctor will work with you to decide what
kind will be best for you. - Single-chamber pacemakers stimulate
one chamber of the heart, either an upper chamber (atrium) or,
more commonly, a lower one (ventricle). - Dual-chamber
pacemakers send electrical impulses to both the atrium and the
ventricle and pace both chambers. A dual-chamber pacemaker
synchronizes the rhythm of the atrium and ventricles in a
pattern that closely resembles the natural heartbeat. Dual-
chamber pacemakers are often used to treat a slow heart rate. -
Biventricular pacemakers pace the rhythm of the heart's lower
chambers (ventricles) so that the chambers contract at the same
time. Biventricular pacemakers are used in people who have heart
failure and problems with the heart's electrica