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Chest, Vol 87, 256-257, Copyright © 1985 by American College of Chest Physicians

ARTICLES

Giant pacemaker spikes. An electrocardiographic artifact

RW Peters, M Kushner and K Knapp

The size and orientation of the spikes produced by a pacemaker are often used by clinicians as an index of the pacemaker's function. Following implantation, the pacemaker spikes ordinarily remain constant in size; alterations suggest electrical or mechanical malfunction. We describe a patient in whom giant spikes from a pacemaker were recorded on a digital electrocardiograph shortly after implantation. An electrocardiogram taken the following day, using an analog machine, showed marked diminution in the pacemaker spike. Because of a different type of signal processing, digital electrocardiographs show much larger spikes from pacemakers than do analog machines.




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Copyright © 1985 by the American College of Chest Physicians.