But there are very important differences between atrial fibrillation and atrial flutter -- both in terms of the precise mechanism of the arrhythmia, but also how they're treated.

Differences While atrial flutter and atrial fibrillation are each conditions that involve the atria (the heart's upper chambers), there are some differences between the two conditions.

Atrial flutter is similar to another type of arrhythmia called atrial fibrillation (AFib). Both start in the upper chambers of the heart and cause a fast heartbeat and increase your risk of stroke.

Atrial flutter is a type of abnormal heart rate. It occurs when the upper chambers of your heart beat too fast.

New-onset atrial fibrillation and atrial flutter are as common in hospitalized patients with influenza as with COVID-19, suggesting the connection between the arrhythmias and COVID-19 is related ...

Atrial flutter is a disorder which causes the heart to beat out of its normal rhythm. Learn more here.