title: Undersensing in VVI-pacemakers detected by Holter monitoring.
abstract: Episodic failure to sense cardiac activity, with emission of pacemaker stimuli, was unexpectedly found on Holter monitoring of two asymptomatic patients who had had normal function of a VVI pacemaker on direct ECG recording. Pectoral muscle movement was then demonstrated to cause pacemaker noise reversion. After decrease of input sensitivity the phenomenon stopped.
authors: Department of Cardiology, Catharina Hospital, Eindhoven, The Netherlands.
authors: L M
authors: LM
authors: Van Gelder
authors: M I
authors: MI
authors: el Gamal
mesh_terms: D000368:Aged; D004562:Electrocardiography; D004868:Equipment Failure; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008991:Monitoring, Physiologic / Q000295:instrumentation*; D010138:Pacemaker, Artificial