Why the study?
Does competitive pacing using a demand pacemaker converted to fixed mode terminate supraventricular tachycardia in a patient with Wolff-Parkinson-White syndrome?
Does competitive pacing using a demand pacemaker converted to fixed mode terminate supraventricular tachycardia in a patient with Wolff-Parkinson-White syndrome?
A demand pacemaker can be used to terminate supraventricular tachycardia in Wolff-Parkinson-White syndrome by using a magnet to convert it to fixed mode and induce competitive pacing.
Magnet application to demand pacemakers may terminate SVT in WPW; single case leaves open efficacy, safety, and need for prospective evaluation.
This paper describes a new technique for terminating attacks of supraventricular tachycardia in a patient with Wolff-Parkinson-White syndrome by using a demand pacemaker. The circuitry of this demand pacemaker generator is designed so that a magnet held near the generator converts the unit from demand to fixed mode at a pre-set discharge rate of 72/min. During an attack of tachycardia, a magnet held near the generator pocket activates a fixed rate discharge and produces competitive pacing. Retrograde atrial depolarization occurs with resultant reversion to sinus rhythm.
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Ryan et al. (1968) studied this question.
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