An arrhythmia is an abnormal rhythm of the heart that can cause
the heart to pump less effectively. Atrial fibrillation is a
type of arrhythmia in which the electrical signals in the atria,
or the two small chambers of the heart, are fired in a very fast
and uncontrolled manner. Atrial flutter is a common type of
arrhythmia, where your atria beat more quickly than they should.
Although usually not life-threatening, the condition makes it
difficult for your heart to pump blood efficiently. Frequently
Asked Questions About Pacemakers and Implantable Cardioverter
Defibrillators (ICDs) Do cell phones interfere with pacemakers?
Do ICDs need to be adjusted? Here are answers to these and other
questions. - Heart Block When you have heart block, there is
interference with the electrical signals that usually move from
the top chambers of your heart (the atria) to the bottom
chambers of your heart (the ventricles), telling it when to
beat. This is known as a conduction disorder. Living with a
Pacemaker or Implantable C