<unk>  <unk>  is a cardiac arrhythmia which is specifically a type of supraventricular tachycardia with an irregular, rapid<unk>  rhythm arising from multiple ectopic foci within the<unk> with a heart rate exceeding 100 beats per minute. It is characterized by an organized<unk>  activity yielding three or more different non-sinus P wave morphologies in the same lead with variable or irregular PP, PR and RR intervals. There's an isoelectric baseline between P waves with the most P waves being conducted to the ventricles and some R waves being aberrantly conducted. This variability pattern makes<unk>  look irregular on the surface ECG, thus oftenly leading to misinterpretion as<unk>  fibrillation. It is typically seen in elderly patients with a variety of underlying comorbidities, the most common being chronic obstructive pulmonary disease (COPD) and congestive heart failure (CHF) and eventually it develops into<unk>  fibrillation. A rhythm with similar ECG characteristics but at a slow rate is referred to as<unk><unk>  rhythm (MAR). The pathogenesis of<unk>  is not well understood and the patients are generally asymptomatic with mostly being hemodynamically stable. Typically, no treatment is required beyond treatment of underlying conditions in the majority of the<unk>  patients. However, it is very important to evaluate such patients as this arrhythmia is a poor prognostic sign in the setting of an acute illness.
Multifocal atrial tachycardia
Wandering atrial pacemaker
Supraventricular arrhythmias
Narrow complex tachycardia
Wide complex tachycardia
Ectopic atrial rhythm
Paroxysmal AV block
AV reentrant tachycardia