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Cardiac denervation in diabetes.

B L Siow

    Annals of the Academy of Medicine, Singapore
    |July 1, 1983
    PubMed
    Summary

    Diabetic autonomic neuropathy can damage the heart early. Beat-to-beat heart rate variation tests, like the 30/15 Ratio, help detect this early cardiac denervation in diabetes patients.

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    Area of Science:

    • Cardiology
    • Neurology
    • Endocrinology

    Background:

    • Diabetic autonomic neuropathy (DAN) is a common complication.
    • Cardiac parasympathetic damage is an early sign of cardiac denervation in diabetic patients.

    Purpose of the Study:

    • To assess cardiac parasympathetic damage in diabetic patients using beat-to-beat heart rate variation.
    • To evaluate the correlation between different methods of assessing heart rate variation and their clinical utility.

    Main Methods:

    • Beat-to-beat variation was measured in 35 diabetic patients.
    • Methods included Maximum-Minimum Heart Rate, 30/15 Ratio, and Standard Deviation of R-R intervals.
    • Correlation between methods and with diabetes duration/complications was analyzed.

    Main Results:

    • The 30/15 Ratio and Maximum-Minimum Heart Rate methods showed good correlation.
    • No strong correlation was found between diabetes duration and impaired beat-to-beat variation.
    • Late diabetes complications were associated with impaired autonomic function tests.

    Conclusions:

    • Beat-to-beat heart rate variation is a valuable tool for detecting early cardiac denervation in diabetics.
    • The 30/15 Ratio and Maximum-Minimum Heart Rate are reliable methods for assessment.
    • Early detection of DAN is crucial due to its association with late diabetic complications.

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