<unk>  is a condition in which an artificial implanted pacemaker stimulates the the ventricles (the lower chambers of the heart) to beat at rates that are inappropriately fast.
Pacemaker mediated tachycardia
Pre-excitation syndrome
Runaway pacemaker syndrome
Sinoatrial nodal reentry tachycardia
Wandering atrial pacemaker
Fascicular VT
Ectopic atrial rhythm
Catecholaminergic polymorphic ventricular tachycardia