The heart rhythm is seen through an electrocardiogram. To make the diagnosis, there must be at least 3 different P-wave morphologies in a single ECG lead due to the shifting of the<unk>  in the<unk>  This is different from normal sinus rhythm where one will see the same P-wave morphology through the same lead because each beat is started from the SA node. The P-wave is normally upright or positive in leads I and II and therefore may be the helpful when determining changing P-wave morphologies. Other common changes that are seen on ECG with<unk>  include differing PR intervals and PP intervals. Another heart rhythm similar to<unk>  is multifocal<unk>  tachycardia. Both arrhythmias have at least 3 different P-wave morphologies in a single ECG lead, but the heart rate is different. When the heart rate is lower than 100 beats per minute, the heart rhythm is considered<unk> . When the heart rate is greater than 100 beats per minute, the heart rhythm is considered multifocal<unk>  tachycardia.
Wandering atrial pacemaker
Junctional ectopic tachycardia
AV nodal reentrant tachycardia
Ventricular escape beat
Atrioventricular reentrant tachycardia
Ectopic pacemaker
Accelerated idioventricular rhythm
Re-entry ventricular arrhythmia