Intermittent Irregular Pacemaker‐Mediated Tachycardia

Pacemaker‐mediated arrhythmias

“…This irregularity may be related to the variable conduction time in retrograde or anterograde limbs of the circuit, triggered pacing or a change in the circuit of ELT. 8 Furthermore, using algorithms such as IRSplus algorithm (Biotronik) to promote intrinsic atrioventricular conduction and limit right ventricular pacing may cause pacemaker-mediated tachycardia with several changes in cycle length. 9 A useful way to observe the inducibility of this arrhythmia is performing an atrial threshold test to see the effect of loss of atrial capture.…”

“…This type of arrhythmia is almost always regular; however, ELT with variable cycle lengths has been reported. This irregularity may be related to the variable conduction time in retrograde or anterograde limbs of the circuit, triggered pacing or a change in the circuit of ELT . Furthermore, using algorithms such as IRSplus algorithm (Biotronik) to promote intrinsic atrioventricular conduction and limit right ventricular pacing may cause pacemaker‐mediated tachycardia with several changes in cycle length …”