title: Mechanically mediated pacemaker pseudomalfunction.
abstract: A case is described of pacemaker pseudomalfunction caused by intermittent displacement of the ventricular lead. The displacement was shown to be caused by critically timed atrial contractions, dislodging the looped ventricular lead, and resulting in intermittent failure to stimulate the heart.
mesh_terms: D000368:Aged; D004562:Electrocardiography; D004868:Equipment Failure; D006325:Heart Atria; D006327:Heart Block / Q000503:physiopathology / Q000628:therapy*; D006801:Humans; D008297:Male; D009200:Myocardial Contraction; D010138:Pacemaker, Artificial