What question did this study set out to answer?

This study aims to evaluate the dispersion of repolarisation in canine ventricles during different pacing techniques.

March 1, 1983Cardiovascular Research

Dispersion of monophasic action potential durations and activation times during atrial pacing, ventricular pacing, and ventricular premature stimulation in canine ventricles

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Population

9 open-chest dogs

Comparison

Atrial pacing, ventricular pacing, and… vs Comparison between different pacing modes

Design

Preclinical

Authors

CKC S KuoRutgers, The State University of New Jersey JAJan AmlieOslo University Hospital KMKazuo MunakataTsurumi University

Discussion

Member takes

Implication

Pacing mode shifts dominant dispersion drivers in canine ventricles; extends mechanistic insights but leaves open human arrhythmia relevance.

Key Points

This study aims to evaluate the dispersion of repolarisation in canine ventricles during different pacing techniques.
Utilized six simultaneously recorded monophasic action potentials from nine open-chest dogs.
Measured maximum dispersion during atrial pacing, ventricular pacing, and programmed ventricular premature stimulation.
Analyzed differences in monophasic action potential duration and activation times across pacing methods.
Maximum dispersion during atrial pacing averaged 32±10 ms, mainly due to MAPD differences.
During ventricular pacing, maximum dispersion was 77±16 ms, predominantly from activation time differences.
Ventricular premature stimulation increased MAPD differences, resulting in maximum dispersion of 97±16 ms.

Structured PICO

Population

9 open-chest dogs

Intervention

Atrial pacing (AP), ventricular pacing (VP), and programmed ventricular premature stimulation (VPS)

Comparator

Comparison between different pacing modes (AP vs VP vs VPS)

Outcome

Dispersion of repolarisation and its components (monophasic action potential duration and activation time differences)surrogate

In a canine model, maximum dispersion of repolarization is predominantly driven by action potential duration differences during atrial pacing, but by activation time differences during ventricular pacing.

Cite This Study

Kuo et al. (1983) studied this question.

synapsesocial.com/papers/6a7198a726770c2b8de129ff https://doi.org/10.1093/cvr/17.3.152

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Implication

Pacing mode shifts dominant dispersion drivers in canine ventricles; extends mechanistic insights but leaves open human arrhythmia relevance.

Dispersion of monophasic action potential durations and activation times during atrial pacing, ventricular pacing, and ventricular premature stimulation in canine ventricles

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Dispersion of monophasic action potential durations and activation times during atrial pacing, ventricular pacing, and ventricular premature stimulation in canine ventricles

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Also Consider

Also Consider