Atrial flutter (AFL) is a type of abnormal heart rhythm, or arrhythmia. It occurs when the upper chambers of your heart beat too fast, causing the bottom chambers to also beat faster than normal.

Atrial flutter is similar to atrial fibrillation in that the rhythm originates in the atrium and causes a narrow complex tachycardia, which carries thromboembolic risk. Typical atrial flutter results ...

Atrial flutter is a type of irregular heartbeat, or an arrhythmia. It causes your heart to beat too fast. Atrial flutter doesn't always have symptoms, but it can sometimes have serious consequences if ...