[Clinical experiences and experimental studies of false sensing with demand pacemakers (author's transl)].
False triggering with a ventricular triggered pacemaker and false inhibition with a ventricular inhibited pacemaker were observed in two patients with complete heart block. These arrhythmias were considered to be attributable to false sensing with a demand pacemaker. Both in vitro and in vivo studies were performed to elucidate the mechanism of these false sensings, and the false sensings were reproduced in a series of experiments. Loose contact of the tip of electrodes to myocardial tissue, refractory period, the distance between two electrodes, and the after potential and its dv/dt of pacemaker impulses are considered to affect the performance of demand pacers.
D000328:Adult; D000818:Animals; D001919:Bradycardia / Q000209:etiology; D004285:Dogs; D004567:Electrodes, Implanted; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial / Q000009:adverse effects*; D013610:Tachycardia / Q000209:etiology