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Atrial fibrillation induced by testing magnet applied to VVI pacemaker
Pacing and Clinical Electrophysiology : PACE
|March 1, 1984
Summary
This study reports the first instance of magnet-induced atrial fibrillation testing in a patient with a VVI pacemaker. A macro-reentry mechanism is proposed to explain the observed asynchronous pacemaker stimulus.
Area of Science:
- Cardiology
- Electrophysiology
- Medical Device Technology
Background:
- Atrial fibrillation (AF) is a common arrhythmia.
- Pacemakers are frequently implanted for cardiac rhythm management.
- VVI pacemakers pace only the ventricle.
Observation:
- This is the first reported case of magnet-induced atrial fibrillation testing in a patient with a VVI pacemaker.
- An asynchronous ventricular stimulus was delivered by the pacemaker.
Findings:
- Magnet application to the VVI pacemaker induced atrial fibrillation.
- A macro-reentry mechanism is postulated as the cause.
- Retrograde conduction from the ventricle through the AV node to the atrium occurred following the asynchronous stimulus.
Implications:
- Understanding pacemaker-induced arrhythmias is crucial for patient safety.
- This case highlights potential interactions between pacemakers and diagnostic maneuvers.
- Further research may be needed to optimize pacemaker programming and prevent such events.