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Treadmill exercise test using body surface mapping. A quantitative diagnostic method for coronary artery disease

I Kubota, K Saito, Y Watanabe

    Japanese Heart Journal
    |November 1, 1981
    PubMed
    Summary

    Body surface mapping quantifies coronary artery disease severity by analyzing ST changes after treadmill exercise. This method aids in diagnosing coronary artery disease, particularly in symptomatic individuals.

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    Area of Science:

    • Cardiology
    • Medical Imaging
    • Diagnostic Tools

    Background:

    • Coronary artery disease (CAD) diagnosis often relies on subjective interpretations.
    • Quantitative methods are needed for precise CAD assessment.
    • Treadmill exercise tests are common but require objective evaluation.

    Purpose of the Study:

    • To quantitatively evaluate coronary artery disease (CAD) using body surface mapping.
    • To correlate ST changes on body surface maps with CAD severity and left ventricular function.
    • To establish treadmill exercise with body surface mapping as a diagnostic tool.

    Main Methods:

    • Recorded body surface electrocardiograms (ECGs) from 87 chest wall points before and after treadmill exercise in 27 patients.
    • Constructed ST difference maps by subtracting pre-exercise ST levels from post-exercise ST levels at each lead.

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  • Utilized ST level at 60 msec from the J point for map construction.

    • Main Results:

    • Body surface mapping effectively visualized ST changes induced by treadmill exercise.
    • The size of the ST-depression area in ST difference maps correlated with CAD severity.
    • ST-elevation areas showed a strong correlation with regional left ventricular wall motion abnormalities.

    Conclusions:

    • Treadmill exercise combined with body surface mapping offers a quantitative approach to diagnosing CAD.
    • This method is particularly valuable for symptomatic patients requiring precise diagnosis.
    • Body surface mapping provides objective data for assessing CAD severity and its impact on cardiac function.