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Atrial fibrillation is the most common heart rhythm disorder (arrhythmia) in the United States, affecting 2.3 million people.  Each year, more than 5 million office visits are made for atrial fibrillation in this country.  Despite the increasing numbers of patients with this arrhythmia, there is growing confusion about how to treat atrial fibrillation amidst recent scientific and technological advancements.

Cardiac rhythm devices include pacemakers, defibrillators and loop recorders, which are implanted into patients to diagnose or treat abnormal heart rhythms or manage congestive heart failure.