A Case of Loss of Ventricular Pacing Due to Inappropriate Hysteresis Function Programming After AV Node Ablation

Modern implantable devices capable of pacing are armed with a multitude of programmable and automated features. Although some features represent important advances in device safety and performance, many also can mimic device malfunction and cause clinical manifestations and unnecessary hospital admission. We report a case of "pseudo-malfunction" of a pacemaker due to hysteresis programming that caused symptomatic bradycardia after atrioventricular (AV) node ablation.