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Related Experiment Videos

Electrocardiographic changes with coronary artery spasm.

R L Feldman, J A Hill, J L Whittle

    American Heart Journal
    |December 1, 1983
    PubMed
    Summary

    Electrocardiograms (ECGs) may not always detect coronary artery spasm, even during angina episodes. A lack of ECG changes does not rule out transient myocardial ischemia caused by coronary spasm.

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    Area of Science:

    • Cardiology
    • Diagnostic Imaging

    Background:

    • Coronary artery spasm is a significant cause of myocardial ischemia.
    • Electrocardiogram (ECG) changes are commonly used to diagnose ischemia.

    Purpose of the Study:

    • To evaluate the sensitivity of ECGs in detecting coronary artery spasm during angina.
    • To determine if a lack of ECG changes excludes coronary spasm as a cause of ischemia.

    Main Methods:

    • Prospective evaluation of 79 patients with confirmed coronary artery spasm.
    • Inclusion of multiple ECGs and ambulatory monitoring during angina episodes.
    • Assessment of ECGs before, during, and after cardiac catheterization.

    Main Results:

    • Eight patients (approximately 10%) with coronary artery spasm did not exhibit typical ECG changes during rest angina.
    • ECG monitoring showed variability in detecting ischemia associated with coronary spasm.

    Conclusions:

    • ECG findings may not be consistently sensitive for diagnosing coronary artery spasm.
    • Transient myocardial ischemia secondary to coronary spasm should be considered even in the absence of ECG changes during rest angina.

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