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[The pseudo-pacemaker syndrome]

R Kuniyoshi¹, E Sosa, M Scanavacca

¹Instituto do Coração, Hospital das Clínicas, FMUSP, San Paulo.

Arquivos Brasileiros De Cardiologia

|August 1, 1994

Summary

This summary is machine-generated.

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Pseudo-pacemaker syndrome can arise after treatments for atrioventricular nodal reentrant tachycardia or spontaneously. Preserving the fast pathway during ablation prevents this condition, which requires careful diagnosis in cases of syncope.

Area of Science:

Cardiology
Electrophysiology
Medical Devices

Background:

Atrioventricular nodal reentrant tachycardia (AVNRT) is a common supraventricular tachycardia.
Radiofrequency ablation is a standard treatment for AVNRT.
Pseudo-pacemaker syndrome is a rare complication affecting pacemaker function.

Observation:

Three cases of pseudo-pacemaker syndrome were identified.
One case resulted from selective fast pathway ablation for AVNRT.
Two cases occurred spontaneously, associated with first-degree atrioventricular block and sinus node tachycardia.

Findings:

Pseudo-pacemaker syndrome is linked to specific electrophysiological conditions.
Catheter ablation for AVNRT can induce this syndrome if the fast pathway is not preserved.

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Spontaneous occurrence is possible, highlighting the need for differential diagnosis.

Implications:

Careful technique during radiofrequency ablation for AVNRT is crucial to avoid pseudo-pacemaker syndrome.
This syndrome should be considered in the etiological investigation of syncope.
Management may involve induction of complete atrioventricular block and permanent pacemaker implantation.