Also known as focal<unk> , Paroxysmal<unk>  (PAT), unifocal<unk> , ectopic<unk> 
Rate >100 bpm
Electrical focus that originates outside in the sinus node at a single location
By comparison, reentrant tachycardias (eg. AVRT, AVNRT) involve multiple foci/ larger circuits
Sustained<unk>  can lead to a tachycardia-induced cardiomyopathy.
Differs from sinus tachycardia in that the impulses are generated by an ectopic focus somewhere within the<unk>  myocardium rather than the sinus node.
Multifocal<unk>  is similar, but has P waves with at least three different morphologies.
The combination of<unk>  plus AV block is particularly common in digoxin toxicity.
By comparison, reentrant tachycardias (eg. AVRT, AVNRT) involve multiple foci/ larger circuits
Atrial tachycardia
Regular
Wide-complex tachycardia
AV Node Independent
Junctional tachycardia
Sinus tachycardia
Narrow-complex tachycardia
Atrial tachycardia 