Massumi R A, Beeson C R, Udhoji V N, Bersohn M M, Usselman L B
Pacing Clin Electrophysiol. 1986 May;9(3):316-21. doi: 10.1111/j.1540-8159.1986.tb04486.x.
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.