Atrial flutter occurs in many of the same situations as atrial fibrillation, which is much more common. Atrial flutter may be a stable rhythm or a bridge arrhythmia between sinus rhythm and atrial fibrillation. It may also be associated with a variety of other supraventricular arrhythmias. In atrial flutter, your heart's upper chambers (atria) beat too quickly. This causes the heart to beat in a fast, regular rhythm. Atrial flutter is a type of heart rhythm disorder (arrhythmia) caused by problems in your heart's electrical system. Atrial flutter is similar to atrial fibrillation, a common heart rhythm disorder.
Based on a 1998 survey of 211 general practices representing a total population of 1.4 million patients in England and Wales, 1.28% of the total population of the UK has AF . A more recent study in England revealed that the overall prevalence of AF among practices uploading data from 2009 to 2012 was 1.76% . The prevalence of AF roughly doubles with each advancing decade of age, from 0.5% at age 50–59 years to almost 9% at age 80–90 years . The incidence of AF in a cohort of 15,406 adults aged 45–64 years living in the west of Scotland and screened between 1972–1976 and 1977–1979 was 0.54 cases per 1000 person years