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Paradoxical Induction of Endless Loop Tachycardia by Magnet Application Over a DDD Pacemaker
Author(s) -
BAROLD S. SERGE,
FALKOFF MICHAEL D.,
ONG LING S.,
HEINLE ROBERT A.
Publication year - 1986
Publication title -
pacing and clinical electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.686
H-Index - 101
eISSN - 1540-8159
pISSN - 0147-8389
DOI - 10.1111/j.1540-8159.1986.tb06606.x
Subject(s) - medicine , magnet , tachycardia , permanent magnet synchronous generator , cardiology , pulse generator , electrical engineering , voltage , engineering
It is well known that removal of a testing magnet from a DDD pulse generator may cause endless loop tachycardia in patients with retrograde ventriculoatrial conduction; application of the magnet then terminates the tachycardia. We have observed the opposite response to the magnet and in this report we describe the paradoxical induction of endless loop tachycardia by magnet application over a DDD pulse generator and its persistence despite repeated removal and reapplication of the magnet. This unusual behavior occurred only in the “magnet off” function and is due to magnet‐induced signals sensed by the atrial channel circuitry.