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 ...

There is no thromboembolism risk in MAT such is seen in atrial fibrillation/flutter, since the atrium are contractile in MAT. If the heart rate is < 100 beats per minute, then the rhythm is called ...