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Externally activated antitachycardia pacemaker with noninvasive electrophysiologic re-testing capability.

K Aonuma, J J Rozanski, S S Barold

Pacing and Clinical Electrophysiology : PACE

|March 1, 1985

Summary

A special pacemaker effectively treated drug-resistant supraventricular tachycardia in three patients. However, success rates varied for ventricular tachycardia, indicating a need for further development in pacemaker technology for arrhythmia management.

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Area of Science:

Cardiology
Biomedical Engineering

Background:

Drug-resistant supraventricular tachycardia (SVT) and ventricular tachycardia (VT) pose significant clinical challenges.
Pacemaker technology offers potential therapeutic options for managing these arrhythmias.

Observation:

An Omni Orthocor 234A pacemaker was implanted in nine patients (3 with SVT, 6 with VT).
The device uses an external unit for stimulation at various intervals (195-500 ms).
Noninvasive electrophysiology studies were conducted using a triggered mode responsive to chest wall stimulation.

Findings:

Effective treatment was observed in three patients with reciprocating SVT over a 2.2-year follow-up.
Four out of six patients with VT remained successfully managed during a 1.9-year follow-up.
The device demonstrated utility in serial noninvasive electrophysiologic testing.

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Implications:

This pacemaker technology shows promise for selected patients with specific tachyarrhythmias.
Further refinement is needed for broader clinical application in arrhythmia management.
The device may aid in long-term clinical follow-up and electrophysiologic testing.