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Related Experiment Videos

Ventricular arrhythmias. A guide to their localisation.

P M Holt, C Smallpeice, P B Deverall

    British Heart Journal
    |April 1, 1985
    PubMed
    Summary

    This study created an electrocardiographic atlas of ventricular tachycardias by pacing heart sections. The resulting distinctive patterns aid in localizing arrhythmias and understanding cardiac disease.

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    Area of Science:

    • Cardiology
    • Electrophysiology
    • Medical Imaging

    Background:

    • Ventricular tachycardias (VTs) are serious arrhythmias.
    • Accurate localization of VT origin is crucial for effective treatment.
    • Existing methods for VT mapping can be invasive or lack precision.

    Purpose of the Study:

    • To develop an electrocardiographic atlas of ventricular tachycardias.
    • To correlate specific 12-lead electrocardiogram (ECG) patterns with pacing sites in the ventricles.
    • To aid in the localization of VT origin and underlying cardiac disease.

    Main Methods:

    • Pacing of 27 epicardial sections and mitral papillary muscles in 129 cardiac surgery patients.
    • Recording and analysis of 12-lead ECGs, including QRS axis, amplitude, and duration.
    • Simulation of focal ventricular arrhythmias through electrical stimulation.

    Main Results:

    • Each paced ventricular region produced a unique 12-lead ECG pattern.
    • Distinct QRS axis patterns (frontal and horizontal planes) were identified for different pacing locations.
    • ECG accuracy for localization varied by ventricular region, being most accurate for the anterior left ventricle.

    Conclusions:

    • A comprehensive electrocardiographic atlas of ventricular arrhythmias was successfully created.
    • This atlas provides a valuable tool for comparing VT localization with cardiac disease sites.
    • The atlas can facilitate mapping for refractory VT ablation, improving patient outcomes.

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