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 ...

Atrial fibrillation Atrial flutter with variable conduction Multifocal atrial tachycardia (MAT). With atrial fibrillation, no descrete P waves can be seen, however sometimes coarse "fibrillitory ...