Stroke risk in atrial flutter is related to concomitant atrial fibrillation

Among 395,147 patients over 65 years of age, the risk of stroke in those with chronic atrial flutter is increased when atrial fibrillation (AF) is also present and is equivalent to the risk associated with only AF. The incidence of stroke in those with isolated atrial flutter is the same as the risk in the control patients who have no atrial arrhythmia.