Atrial systole and ineffective pacemaker stimuli

An unusual case of pacemaker failure induced by atrial activity is presented. The pacemaker stimulus was ineffective for ventricular capture not only with low energy output (decreased pulse duration) of the generator, but also with pulse width two to three times the stimulation threshold. The two po...

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Bibliographic Details
Published in:	Pacing and clinical electrophysiology Vol. 4; no. 5; p. 517
Main Authors:	Goicolea De Oro, A, Ayala, G S, Ayza, M W, Meabe, J A, Díez, J R, Garrido, R H, Ripoll, A S, Alvarez, J G
Format:	Journal Article
Language:	English
Published:	United States 01-09-1981
Subjects:	Aged Electrocardiography Electronics Equipment Failure Heart Atria - physiopathology Heart Block - therapy Humans Male Pacemaker, Artificial
Online Access:	Get more information
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Summary:	An unusual case of pacemaker failure induced by atrial activity is presented. The pacemaker stimulus was ineffective for ventricular capture not only with low energy output (decreased pulse duration) of the generator, but also with pulse width two to three times the stimulation threshold. The two possible mechanisms of this phenomenon, one electrotonic and the other mechanical, are discussed. This report strongly supports the mechanical hypothesis.
ISSN:	0147-8389
DOI:	10.1111/j.1540-8159.1981.tb06221.x