Myopotential interference with a unipolar VDD pacemaker presenting with tachycardia and transient ventricular asystole.
Interference between myopotentials and pacemakers is well recognized, especially in a unipolar pacing system. This case report describes myopotential interference with an atrial synchronous ventricular inhibited (VDD) unipolar pacemaker in a 54-year-old woman. The interference caused both repetitive ventricular upper rate pacing and sometimes ventricular channel inhibition, resulting in palpitation and near syncope. Provocative tests elicited the myopotential interference reproducibly. The problem was partially corrected by further sensitivity adjustment.
Liang
Hsin-Yueh
HY
Department of Internal Medicine, Kaohsiung Municipal Hsiao-Kang Hospital, Taiwan.
Lee
Chee-Siong
CS
Lin
Ching-Cheng
CC
Chen
Yin-Fu
YF
D000200:Action Potentials; D004562:Electrocardiography; D005260:Female; D006323:Heart Arrest / Q000209:etiology*; D006801:Humans; D008875:Middle Aged; D009132:Muscles / Q000502:physiology*; D010138:Pacemaker, Artificial / Q000009:adverse effects*; D013610:Tachycardia / Q000209:etiology*