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Training Dogs for Awake, Unrestrained Functional Magnetic Resonance Imaging

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Published on: October 13, 2019

Noise reversion in paced dogs.

N Sydney Moïse¹, Amara Estrada

¹Section of Cardiology - Department of Clinical Sciences College of Veterinary Medicine - Cornell University - Ithaca, New York, USA.

Journal of Veterinary Cardiology : the Official Journal of the European Society of Veterinary Cardiology

|December 17, 2008

Summary

This summary is machine-generated.

Improper pacemaker programming in dogs can lead to dangerous asynchronous pacing, known as noise reversion. Adjusting pacemaker settings, specifically shortening the refractory period and decreasing sensitivity, can prevent this complication in dogs with both bradycardia and tachycardia.

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Area of Science:

Veterinary Cardiology
Biomedical Engineering

Background:

Pacemakers are frequently implanted in dogs experiencing bradyarrhythmias.
Historically, pacemaker programming focused primarily on basic heart rate, overlooking potential complications.
Advances in pacing technology necessitate a deeper understanding of safe and effective pacemaker function in canine patients.

Purpose of the Study:

To identify and characterize the incidence of noise reversion in paced dogs.
To investigate the underlying causes of noise reversion in canine pacemaker patients.
To determine optimal programming strategies to mitigate noise reversion.

Main Methods:

Retrospective analysis of pacemaker data from 19 consecutively paced dogs over a 2-year period.
Identification of noise reversion events and correlation with patient heart rhythms.
Evaluation of pacemaker programming parameters, including refractory period and sensitivity settings.

Main Results:

Noise reversion (inappropriate asynchronous pacing) was identified in 42% of the studied canine population.
This complication is linked to the coexistence of bradycardia and tachycardia in dogs.
Noise reversion occurs when the pacemaker incorrectly interprets non-cardiac signals as cardiac events, leading to pacing inhibition.

Conclusions:

Noise reversion is a significant complication in paced dogs, potentially leading to dangerous asynchronous pacing.
Proper pacemaker programming, specifically shortening the refractory period and decreasing sensitivity, can effectively eliminate noise reversion.
These adjustments are crucial for ensuring safe and appropriate pacemaker function in dogs with concurrent bradycardia and tachycardia.