<unk>  is a benign<unk>  in most settings and does not usually require treatment
Self limiting and resolves when sinus rate exceeds that of the ventricular foci
Antiarrhythmics may cause precipitous haemodynamic deterioration and should be avoided
Treat the underlying cause: e.g. correct electrolytes, restore myocardial perfusion
Patients with low-cardiac-output states (e.g. severe biventricular failure) may benefit from restoration of AV synchrony to restore atrial kick – in this case atropine may be trialled to increase sinus rate and AV conduction
Accelerated idioventricular rhythm
Assume any wide-complex tachycardia is ventricular tachycardia until proven otherwise 
Wide-complex tachycardia
Regular
Wandering atrial pacemaker
Monomorphic ventricular tachycardia
Narrow-complex tachycardia
PSVT with aberrant conduction: