Differential diagnosis<unk>  appears similar to ventricular tachycardia with wide QRS complexes (QRS >0.12s) and a regular<unk> . It can most easily be distinguished from VT in that the rate is less than 120 and usually less than 100 bpm. There may or may not be AV dissociation depending on whether it is due to ventricular escape or AV block.
Accelerated idioventricular rhythm
Ventricular escape beat
Wandering atrial pacemaker
Junctional ectopic tachycardia
Atrioventricular reentrant tachycardia
Inappropriate sinus tachycardia
Second-degree atrioventricular block
AV nodal reentrant tachycardia