What is the clinical evidence from this study?

Study design: Cohort. Population: Cardiac pacemakers in dogs (n=11). Intervention: Cardiac pacemakers. Primary outcome: Impedance over time (p=0.0054).

What does this research mean for the field?

Cardiac pacemaker implantation in dogs is associated with a significant reduction in myocardial impedance over time while maintaining stable battery life and low complication rates. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To evaluate the longitudinal behavior of primary cardiac pacemaker programming parameters, procedural complications, and overall survival times in dogs.

September 17, 2026American Journal of Veterinary ResearchOpen Access

Pacemaker implantation in dogs is linked to reduced myocardial impedance and ~30 months median survival.

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Why the study?

How do cardiac pacemaker parameters behave over time in dogs?

Population

11 dogs of various breeds, ages, and sexes that received cardiac pacemakers at a veterinary teaching…

Design

Cohort

Follow-up

up to ≥ 912 days (median survival 30 months)

Key result

Cardiac pacemaker implantation in dogs was associated with a significant reduction in myocardial impedance over time (P = 0.0054), with a median survival time of 30 months.

Authors

MOMônica Kanashiro Oyafuso PDPeterson Triches Dornbusch JMJuan Carlos Duque Moreno

Discussion

Member takes

Overview

Clinicians should track serial impedance changes from baseline in dogs with pacemakers; this Level 3 evidence leaves open links to outcomes or management.

Key Points

To evaluate the longitudinal behavior of primary cardiac pacemaker programming parameters, procedural complications, and overall survival times in dogs.
Conducted a retrospective cohort study evaluating dogs that underwent cardiac pacemaker implantation between 2016 and 2023 at a veterinary teaching hospital.
Assessed pacing threshold amplitude, electrical impedance or conductance, and estimated battery longevity at implantation and follow-up intervals up to ≥ 912 days.
Across 11 evaluated dogs, the median survival time was 30 months, with recorded complications restricted to seroma and suture dehiscence.
Myocardial impedance decreased significantly over time according to the Skillings-Mack test (χ2 = 12.692; P = .0054).
Pacing threshold amplitude and estimated device battery life did not change significantly across follow-up intervals.

Study Design

Type

Cohort (n=11)

Multicenter

Structured PICO

How do cardiac pacemaker parameters behave over time in dogs?

Population

11 dogs of various breeds, ages, and sexes that received cardiac pacemakers and had at least 1 baseline assessment, with a median survival time of 30 months.

Exposure

Cardiac pacemaker implantation

Outcome

Pacemaker parameters (pacing threshold amplitude, impedance or conductance, and estimated battery life) assessed immediately after insertion and at reevaluation times (≤ 7, ≤ 90, ≤ 547, ≤ 912, and ≥ 912 days)surrogate

Main Result

p-value: p=0.0054

In dogs receiving cardiac pacemakers, myocardial impedance significantly decreases over time, suggesting clinical interpretation should focus on longitudinal changes relative to baseline rather than isolated reference ranges.

Cite This Study

Oyafuso et al. (2026) conducted a cohort in Cardiac pacemakers in dogs (n=11). Cardiac pacemakers was evaluated on Impedance over time (p=0.0054). Cardiac pacemaker implantation in dogs was associated with a significant reduction in myocardial impedance over time (P = 0.0054), with a median survival time of 30 months.

synapsesocial.com/papers/6aabb68c5f706d05830e510e https://doi.org/10.2460/ajvr.26.03.0102

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September 17, 2026American Journal of Veterinary ResearchOpen Access

Pacemaker implantation in dogs is linked to reduced myocardial impedance and ~30 months median survival.

View Full Paper

Ask AI

Bookmark

Why the study?

How do cardiac pacemaker parameters behave over time in dogs?

Population

11 dogs of various breeds, ages, and sexes that received cardiac pacemakers at a veterinary teaching…

Design

Cohort

Follow-up

up to ≥ 912 days (median survival 30 months)

Key result

Cardiac pacemaker implantation in dogs was associated with a significant reduction in myocardial impedance over time (P = 0.0054), with a median survival time of 30 months.

Authors

MOMônica Kanashiro Oyafuso PDPeterson Triches Dornbusch JMJuan Carlos Duque Moreno

Discussion

Member takes

Overview

Clinicians should track serial impedance changes from baseline in dogs with pacemakers; this Level 3 evidence leaves open links to outcomes or management.

Key Points

To evaluate the longitudinal behavior of primary cardiac pacemaker programming parameters, procedural complications, and overall survival times in dogs.
Conducted a retrospective cohort study evaluating dogs that underwent cardiac pacemaker implantation between 2016 and 2023 at a veterinary teaching hospital.
Assessed pacing threshold amplitude, electrical impedance or conductance, and estimated battery longevity at implantation and follow-up intervals up to ≥ 912 days.
Across 11 evaluated dogs, the median survival time was 30 months, with recorded complications restricted to seroma and suture dehiscence.
Myocardial impedance decreased significantly over time according to the Skillings-Mack test (χ2 = 12.692; P = .0054).
Pacing threshold amplitude and estimated device battery life did not change significantly across follow-up intervals.

Study Design

Type

Cohort (n=11)

Multicenter

Structured PICO

How do cardiac pacemaker parameters behave over time in dogs?

Population

11 dogs of various breeds, ages, and sexes that received cardiac pacemakers and had at least 1 baseline assessment, with a median survival time of 30 months.

Exposure

Cardiac pacemaker implantation

Outcome

Main Result

p-value: p=0.0054

Cite This Study

synapsesocial.com/papers/6aabb68c5f706d05830e510e https://doi.org/10.2460/ajvr.26.03.0102

View Full Paper

Ask AI

Bookmark